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89bio, Inc. – ‘10-Q’ for 9/30/20 – ‘EX-101.LAB’

On: Thursday, 11/12/20, at 7:15pm ET · As of: 11/13/20 · For: 9/30/20 · Accession #: 1564590-20-53677 · File #: 1-39122

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

11/13/20  89bio, Inc.                       10-Q        9/30/20   52:6.8M                                   ActiveDisclosure/FA

Quarterly Report — Form 10-Q
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-Q        Quarterly Report                                    HTML   1.18M 
 2: EX-10.1     Material Contract                                   HTML     28K 
 3: EX-31.1     Certification -- §302 - SOA'02                      HTML     24K 
 4: EX-31.2     Certification -- §302 - SOA'02                      HTML     24K 
 5: EX-32       Certification -- §906 - SOA'02                      HTML     23K 
12: R1          Document and Entity Information                     HTML     73K 
13: R2          Condensed Consolidated Balance Sheets (Unaudited)   HTML     78K 
14: R3          Condensed Consolidated Statements of Operations     HTML     68K 
                and Comprehensive Loss (Unaudited)                               
15: R4          Condensed Consolidated Statements of Convertible    HTML    106K 
                Preferred Stock and Stockholders' Equity Deficit                 
                (Unaudited)                                                      
16: R5          Condensed Consolidated Statements of Convertible    HTML     22K 
                Preferred Stock and Stockholders' Equity Deficit                 
                (Unaudited) (Parenthetical)                                      
17: R6          Condensed Consolidated Statements of Cash Flows     HTML    104K 
                (Unaudited)                                                      
18: R7          Organization and Basis of Presentation              HTML     25K 
19: R8          Summary of Significant Accounting Policies          HTML     35K 
20: R9          Fair Value Measurements                             HTML    161K 
21: R10         Consolidated Balance Sheet Components               HTML     42K 
22: R11         Commitments and Contingencies                       HTML     33K 
23: R12         Term Loan                                           HTML     22K 
24: R13         Stockholders' Equity                                HTML    148K 
25: R14         Net Loss Per Share                                  HTML     40K 
26: R15         Related Party Transactions                          HTML     21K 
27: R16         Summary of Significant Accounting Policies          HTML     57K 
                (Policies)                                                       
28: R17         Fair Value Measurements (Tables)                    HTML    166K 
29: R18         Consolidated Balance Sheet Components (Tables)      HTML     41K 
30: R19         Commitments and Contingencies (Tables)              HTML     29K 
31: R20         Stockholders' Equity (Tables)                       HTML    148K 
32: R21         Net Loss Per Share (Tables)                         HTML     39K 
33: R22         Organization and Basis of Presentation -            HTML     58K 
                Additional Information (Details)                                 
34: R23         Summary of Significant Accounting Policies -        HTML     48K 
                Additional Information (Details)                                 
35: R24         Fair Value Measurements - Summary of Financial      HTML     58K 
                Assets Measured at Fair Value on Recurring Basis                 
                (Details)                                                        
36: R25         Fair Value Measurements - Schedule of Contractual   HTML     25K 
                Maturities of Available-for-Sale Securities                      
                (Details)                                                        
37: R26         Fair Value Measurements - Additional Information    HTML     24K 
                (Details)                                                        
38: R27         Fair Value Measurements - Summary of Changes in     HTML     27K 
                Fair Value of Level 3 Liability (Details)                        
39: R28         Fair Value Measurements - Summary of Fair Value     HTML     39K 
                Assumptions (Details)                                            
40: R29         Consolidated Balance Sheet Components - Schedule    HTML     29K 
                of Accrued Expenses (Details)                                    
41: R30         Commitments and Contingencies - Schedule of Future  HTML     27K 
                Minimum Lease Payments Under Non-cancellable                     
                Operating Lease Obligations (Details)                            
42: R31         Commitments and Contingencies - Additional          HTML     41K 
                Information (Details)                                            
43: R32         Term Loan - Additional Information (Details)        HTML     68K 
44: R33         Stockholders' Equity - Additional Information       HTML     72K 
                (Details)                                                        
45: R34         Stockholders' Equity - Summary of Share-Based       HTML     25K 
                Compensation (Details)                                           
46: R35         Stockholders' Equity - Summary of Estimated Fair    HTML     32K 
                Value of Option Awards Granted Using Black-Scholes               
                Option-Pricing Model (Details)                                   
47: R36         Stockholders' Equity - Summary of Stock Option      HTML     58K 
                Activity (Details)                                               
48: R37         Net Loss Per Share - Schedule of Outstanding        HTML     28K 
                Potentially Dilutive Securities Excluded From                    
                Calculation of Diluted Net Loss (Details)                        
49: R38         Related Party Transactions - Additional             HTML     25K 
                Information (Details)                                            
51: XML         IDEA XML File -- Filing Summary                      XML     90K 
50: EXCEL       IDEA Workbook of Financial Reports                  XLSX     57K 
 6: EX-101.INS  XBRL Instance -- etnb-20200930                       XML   1.29M 
 8: EX-101.CAL  XBRL Calculations -- etnb-20200930_cal               XML    105K 
 9: EX-101.DEF  XBRL Definitions -- etnb-20200930_def                XML    401K 
10: EX-101.LAB  XBRL Labels -- etnb-20200930_lab                     XML    872K 
11: EX-101.PRE  XBRL Presentations -- etnb-20200930_pre              XML    640K 
 7: EX-101.SCH  XBRL Schema -- etnb-20200930                         XSD    113K 
52: ZIP         XBRL Zipped Folder -- 0001564590-20-053677-xbrl      Zip     99K

‘EX-101.LAB’ — XBRL Labels — etnb-20200930_lab

This Exhibit is an XBRL XML File.

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<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">

<link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" xlink:type="simple"/>

<link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" xlink:type="simple"/>

<link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel" xlink:type="simple"/>

<link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" xlink:type="simple"/>

<link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" xlink:type="simple"/>

<link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" xlink:type="simple"/>

<link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" xlink:type="simple"/>

<link:roleRef roleURI="http://fasb.org/us-gaap/role/label/axisDefault" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-roles-2020-01-31.xsd#axisDefault" xlink:type="simple"/>

<link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCentralIndexKey" xlink:type="locator" xlink:label="dei_EntityCentralIndexKey"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Central Index Key </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCentralIndexKey" xlink:to="dei_EntityCentralIndexKey_lbl"/>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CoverAbstract" xlink:type="locator" xlink:label="dei_CoverAbstract"/>

<link:label xml:lang="en-US" xlink:label="dei_CoverAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cover [Abstract] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CoverAbstract" xlink:to="dei_CoverAbstract_lbl"/>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentType" xlink:type="locator" xlink:label="dei_DocumentType"/>

<link:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Document Type </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentType" xlink:to="dei_DocumentType_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Document Type </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AmendmentFlag" xlink:type="locator" xlink:label="dei_AmendmentFlag"/>

<link:label xml:lang="en-US" xlink:label="dei_AmendmentFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Amendment Flag </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AmendmentFlag" xlink:to="dei_AmendmentFlag_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_AmendmentFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Amendment Flag </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentPeriodEndDate" xlink:type="locator" xlink:label="dei_DocumentPeriodEndDate"/>

<link:label xml:lang="en-US" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Document Period End Date </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Document Period End Date </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:type="locator" xlink:label="dei_DocumentFiscalYearFocus"/>

<link:label xml:lang="en-US" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Document Fiscal Year Focus </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalYearFocus" xlink:to="dei_DocumentFiscalYearFocus_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Document Fiscal Year Focus </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:type="locator" xlink:label="dei_DocumentFiscalPeriodFocus"/>

<link:label xml:lang="en-US" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Document Fiscal Period Focus </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalPeriodFocus" xlink:to="dei_DocumentFiscalPeriodFocus_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Document Fiscal Period Focus </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityRegistrantName" xlink:type="locator" xlink:label="dei_EntityRegistrantName"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Registrant Name </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityRegistrantName" xlink:to="dei_EntityRegistrantName_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Registrant Name </link:label>

<link:label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Central Index Key </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCurrentReportingStatus" xlink:type="locator" xlink:label="dei_EntityCurrentReportingStatus"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Current Reporting Status </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCurrentReportingStatus" xlink:to="dei_EntityCurrentReportingStatus_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Current Reporting Status </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityInteractiveDataCurrent" xlink:type="locator" xlink:label="dei_EntityInteractiveDataCurrent"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Interactive Data Current </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityInteractiveDataCurrent" xlink:to="dei_EntityInteractiveDataCurrent_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Interactive Data Current </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:type="locator" xlink:label="dei_CurrentFiscalYearEndDate"/>

<link:label xml:lang="en-US" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Current Fiscal Year End Date </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CurrentFiscalYearEndDate" xlink:to="dei_CurrentFiscalYearEndDate_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Current Fiscal Year End Date </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFilerCategory" xlink:type="locator" xlink:label="dei_EntityFilerCategory"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityFilerCategory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Filer Category </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFilerCategory" xlink:to="dei_EntityFilerCategory_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityFilerCategory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Filer Category </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:type="locator" xlink:label="dei_EntityCommonStockSharesOutstanding"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Entity Common Stock, Shares Outstanding </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCommonStockSharesOutstanding" xlink:to="dei_EntityCommonStockSharesOutstanding_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Common Stock Shares Outstanding </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityShellCompany" xlink:type="locator" xlink:label="dei_EntityShellCompany"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityShellCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Shell Company </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityShellCompany" xlink:to="dei_EntityShellCompany_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityShellCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Shell Company </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntitySmallBusiness" xlink:type="locator" xlink:label="dei_EntitySmallBusiness"/>

<link:label xml:lang="en-US" xlink:label="dei_EntitySmallBusiness_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Small Business </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntitySmallBusiness" xlink:to="dei_EntitySmallBusiness_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_EntitySmallBusiness_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Small Business </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityEmergingGrowthCompany" xlink:type="locator" xlink:label="dei_EntityEmergingGrowthCompany"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Emerging Growth Company </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityEmergingGrowthCompany" xlink:to="dei_EntityEmergingGrowthCompany_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Emerging Growth Company </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityExTransitionPeriod" xlink:type="locator" xlink:label="dei_EntityExTransitionPeriod"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityExTransitionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Ex Transition Period </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityExTransitionPeriod" xlink:to="dei_EntityExTransitionPeriod_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityExTransitionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Ex Transition Period </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_Security12bTitle" xlink:type="locator" xlink:label="dei_Security12bTitle"/>

<link:label xml:lang="en-US" xlink:label="dei_Security12bTitle_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Title of 12(b) Security </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_Security12bTitle" xlink:to="dei_Security12bTitle_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_Security12bTitle_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Security12b Title </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_TradingSymbol" xlink:type="locator" xlink:label="dei_TradingSymbol"/>

<link:label xml:lang="en-US" xlink:label="dei_TradingSymbol_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Trading Symbol </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_TradingSymbol" xlink:to="dei_TradingSymbol_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_TradingSymbol_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Trading Symbol </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_SecurityExchangeName" xlink:type="locator" xlink:label="dei_SecurityExchangeName"/>

<link:label xml:lang="en-US" xlink:label="dei_SecurityExchangeName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Security Exchange Name </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SecurityExchangeName" xlink:to="dei_SecurityExchangeName_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_SecurityExchangeName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Security Exchange Name </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFileNumber" xlink:type="locator" xlink:label="dei_EntityFileNumber"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityFileNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Entity File Number </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFileNumber" xlink:to="dei_EntityFileNumber_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityFileNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity File Number </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityIncorporationStateCountryCode" xlink:type="locator" xlink:label="dei_EntityIncorporationStateCountryCode"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Incorporation, State or Country Code </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Incorporation State Country Code </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityTaxIdentificationNumber" xlink:type="locator" xlink:label="dei_EntityTaxIdentificationNumber"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Tax Identification Number </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityTaxIdentificationNumber" xlink:to="dei_EntityTaxIdentificationNumber_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Tax Identification Number </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine1" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine1"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Address, Address Line One </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine1" xlink:to="dei_EntityAddressAddressLine1_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Address Address Line1 </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine2" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine2"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Address, Address Line Two </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine2" xlink:to="dei_EntityAddressAddressLine2_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Address Address Line2 </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressCityOrTown" xlink:type="locator" xlink:label="dei_EntityAddressCityOrTown"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Address, City or Town </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressCityOrTown" xlink:to="dei_EntityAddressCityOrTown_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Address City Or Town </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressStateOrProvince" xlink:type="locator" xlink:label="dei_EntityAddressStateOrProvince"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Address, State or Province </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressStateOrProvince" xlink:to="dei_EntityAddressStateOrProvince_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Address State Or Province </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressPostalZipCode" xlink:type="locator" xlink:label="dei_EntityAddressPostalZipCode"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Entity Address, Postal Zip Code </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressPostalZipCode" xlink:to="dei_EntityAddressPostalZipCode_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Entity Address Postal Zip Code </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CityAreaCode" xlink:type="locator" xlink:label="dei_CityAreaCode"/>

<link:label xml:lang="en-US" xlink:label="dei_CityAreaCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> City Area Code </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CityAreaCode" xlink:to="dei_CityAreaCode_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_CityAreaCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> City Area Code </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LocalPhoneNumber" xlink:type="locator" xlink:label="dei_LocalPhoneNumber"/>

<link:label xml:lang="en-US" xlink:label="dei_LocalPhoneNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Local Phone Number </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LocalPhoneNumber" xlink:to="dei_LocalPhoneNumber_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_LocalPhoneNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Local Phone Number </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentQuarterlyReport" xlink:type="locator" xlink:label="dei_DocumentQuarterlyReport"/>

<link:label xml:lang="en-US" xlink:label="dei_DocumentQuarterlyReport_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Document Quarterly Report </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentQuarterlyReport" xlink:to="dei_DocumentQuarterlyReport_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_DocumentQuarterlyReport_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Document Quarterly Report </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentTransitionReport" xlink:type="locator" xlink:label="dei_DocumentTransitionReport"/>

<link:label xml:lang="en-US" xlink:label="dei_DocumentTransitionReport_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Document Transition Report </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentTransitionReport" xlink:to="dei_DocumentTransitionReport_lbl"/>

<link:label xml:lang="en-US" xlink:label="dei_DocumentTransitionReport_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Document Transition Report </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:type="locator" xlink:label="us-gaap_StatementOfFinancialPositionAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Statement Of Financial Position [Abstract] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_StatementOfFinancialPositionAbstract_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsAbstract" xlink:type="locator" xlink:label="us-gaap_AssetsAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Assets </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_AssetsAbstract_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Assets [Abstract] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:type="locator" xlink:label="us-gaap_AssetsCurrentAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Current assets: </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_AssetsCurrentAbstract_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Assets Current [Abstract] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:type="locator" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cash and cash equivalents </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cash And Cash Equivalents At Carrying Value </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedCashCurrent" xlink:type="locator" xlink:label="us-gaap_RestrictedCashCurrent"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedCashCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Restricted cash </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedCashCurrent" xlink:to="us-gaap_RestrictedCashCurrent_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedCashCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Restricted Cash Current </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermInvestments" xlink:type="locator" xlink:label="us-gaap_ShortTermInvestments"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Short-term investments </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermInvestments" xlink:to="us-gaap_ShortTermInvestments_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Short Term Investments </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:type="locator" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Prepaid and other current assets </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:to="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Prepaid Expense And Other Assets Current </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsCurrent" xlink:type="locator" xlink:label="us-gaap_AssetsCurrent"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total current assets </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_AssetsCurrent_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Assets Current </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentNet"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Property and equipment, net </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentNet" xlink:to="us-gaap_PropertyPlantAndEquipmentNet_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Property Plant And Equipment Net </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:type="locator" xlink:label="us-gaap_OtherAssetsNoncurrent"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other assets </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssetsNoncurrent" xlink:to="us-gaap_OtherAssetsNoncurrent_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Other Assets Noncurrent </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Assets" xlink:type="locator" xlink:label="us-gaap_Assets"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_Assets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total assets </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Assets" xlink:to="us-gaap_Assets_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_Assets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Assets </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:type="locator" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Liabilities and stockholders’ equity </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Liabilities And Stockholders Equity [Abstract] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:type="locator" xlink:label="us-gaap_LiabilitiesCurrentAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Current liabilities: </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_LiabilitiesCurrentAbstract_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:type="locator" xlink:label="us-gaap_AccountsPayableCurrent"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accounts payable </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableCurrent" xlink:to="us-gaap_AccountsPayableCurrent_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Accounts Payable Current </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:type="locator" xlink:label="us-gaap_AccruedLiabilitiesCurrent"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accrued expenses </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedLiabilitiesCurrent" xlink:to="us-gaap_AccruedLiabilitiesCurrent_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:type="locator" xlink:label="us-gaap_LiabilitiesCurrent"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total current liabilities </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Liabilities Current </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:type="locator" xlink:label="us-gaap_CommitmentsAndContingencies"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Commitments and contingencies (Note 5) </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingencies" xlink:to="us-gaap_CommitmentsAndContingencies_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Commitments And Contingencies </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:type="locator" xlink:label="us-gaap_StockholdersEquityAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stockholders’ equity: </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityAbstract_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stockholders Equity [Abstract] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockValue" xlink:type="locator" xlink:label="us-gaap_CommonStockValue"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common stock </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockValue" xlink:to="us-gaap_CommonStockValue_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock Value </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:type="locator" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Additional paid-in capital </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapitalCommonStock" xlink:to="us-gaap_AdditionalPaidInCapitalCommonStock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Additional Paid In Capital Common Stock </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:type="locator" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accumulated other comprehensive loss </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Accumulated Other Comprehensive Income Loss Net Of Tax </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:type="locator" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accumulated deficit </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquity" xlink:type="locator" xlink:label="us-gaap_StockholdersEquity"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total stockholders’ equity </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stockholders Equity </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:type="locator" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total liabilities and stockholders’ equity </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Liabilities And Stockholders Equity </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:type="locator" xlink:label="us-gaap_IncomeStatementAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Income Statement [Abstract] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_IncomeStatementAbstract_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingExpensesAbstract" xlink:type="locator" xlink:label="us-gaap_OperatingExpensesAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Operating expenses: </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingExpensesAbstract" xlink:to="us-gaap_OperatingExpensesAbstract_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:type="locator" xlink:label="us-gaap_ResearchAndDevelopmentExpense"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Research and development </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentExpense" xlink:to="us-gaap_ResearchAndDevelopmentExpense_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Research And Development Expense </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:type="locator" xlink:label="us-gaap_GeneralAndAdministrativeExpense"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> General and administrative </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GeneralAndAdministrativeExpense" xlink:to="us-gaap_GeneralAndAdministrativeExpense_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> General And Administrative Expense </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingExpenses" xlink:type="locator" xlink:label="us-gaap_OperatingExpenses"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total operating expenses </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingExpenses" xlink:to="us-gaap_OperatingExpenses_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Expenses </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:type="locator" xlink:label="us-gaap_OperatingIncomeLoss"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Loss from operations </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingIncomeLoss" xlink:to="us-gaap_OperatingIncomeLoss_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Income Loss </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:type="locator" xlink:label="us-gaap_OtherNonoperatingIncomeExpense"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other expenses, net </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherNonoperatingIncomeExpense" xlink:to="us-gaap_OtherNonoperatingIncomeExpense_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:type="locator" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel"> Net loss before tax </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_IncomeTaxExpenseBenefit"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Income tax expense </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxExpenseBenefit" xlink:to="us-gaap_IncomeTaxExpenseBenefit_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Income Tax Expense Benefit </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss" xlink:type="locator" xlink:label="us-gaap_NetIncomeLoss"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel"> Net loss </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Net Income Loss </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossTaxAbstract" xlink:type="locator" xlink:label="us-gaap_OtherComprehensiveIncomeLossTaxAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossTaxAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other comprehensive (income) loss: </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeLossTaxAbstract" xlink:to="us-gaap_OtherComprehensiveIncomeLossTaxAbstract_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossTaxAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Other Comprehensive Income Loss Tax [Abstract] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" xlink:type="locator" xlink:label="us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Unrealized gain on available-for-sale securities </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:type="locator" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Foreign currency translation adjustments </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:type="locator" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel"> Total other comprehensive loss </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Other Comprehensive Income Loss Net Of Tax </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:type="locator" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Comprehensive loss </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ComprehensiveIncomeNetOfTax" xlink:to="us-gaap_ComprehensiveIncomeNetOfTax_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareBasicAndDiluted" xlink:type="locator" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Net loss per share, basic and diluted </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareBasicAndDiluted" xlink:to="us-gaap_EarningsPerShareBasicAndDiluted_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Earnings Per Share Basic And Diluted </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:type="locator" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Weighted-average shares used to compute net loss per share, basic and diluted </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:to="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Weighted Average Number Of Share Outstanding Basic And Diluted </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_IssuanceOfCommonStockWarrantInConnectionWithTermLoanFacility" xlink:type="locator" xlink:label="etnb_IssuanceOfCommonStockWarrantInConnectionWithTermLoanFacility"/>

<link:label xml:lang="en-US" xlink:label="etnb_IssuanceOfCommonStockWarrantInConnectionWithTermLoanFacility_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Issuance of common stock warrant in connection with term loan facility. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_IssuanceOfCommonStockWarrantInConnectionWithTermLoanFacility" xlink:to="etnb_IssuanceOfCommonStockWarrantInConnectionWithTermLoanFacility_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:type="locator" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Statement Of Stockholders Equity [Abstract] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfStockholdersEquityAbstract" xlink:to="us-gaap_StatementOfStockholdersEquityAbstract_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable" xlink:type="locator" xlink:label="us-gaap_StatementTable"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StatementTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Statement [Table] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_StatementTable_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StatementTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Statement [Table] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:type="locator" xlink:label="us-gaap_StatementClassOfStockAxis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Class of Stock </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_StatementClassOfStockAxis_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Statement Class Of Stock [Axis] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:type="locator" xlink:label="us-gaap_ClassOfStockDomain"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfStockDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Class of Stock </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="us-gaap_ClassOfStockDomain_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfStockDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Class Of Stock [Domain] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConvertiblePreferredStockMember" xlink:type="locator" xlink:label="us-gaap_ConvertiblePreferredStockMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ConvertiblePreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Convertible Preferred Stock </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConvertiblePreferredStockMember" xlink:to="us-gaap_ConvertiblePreferredStockMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ConvertiblePreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Convertible Preferred Stock [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:type="locator" xlink:label="us-gaap_StatementEquityComponentsAxis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accumulated Other Comprehensive Income (Loss) </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_StatementEquityComponentsAxis_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Statement Equity Components [Axis] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain" xlink:type="locator" xlink:label="us-gaap_EquityComponentDomain"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Equity Component </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_EquityComponentDomain_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Equity Component [Domain] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockMember" xlink:type="locator" xlink:label="us-gaap_CommonStockMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common Stock </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockMember" xlink:to="us-gaap_CommonStockMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:type="locator" xlink:label="us-gaap_AdditionalPaidInCapitalMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Additional Paid-in Capital </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapitalMember" xlink:to="us-gaap_AdditionalPaidInCapitalMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Additional Paid In Capital [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:type="locator" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accumulated Other Comprehensive Loss </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Accumulated Other Comprehensive Income [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:type="locator" xlink:label="us-gaap_RetainedEarningsMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accumulated Deficit </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsMember" xlink:to="us-gaap_RetainedEarningsMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Retained Earnings [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:type="locator" xlink:label="us-gaap_SubsidiarySaleOfStockAxis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Sale of Stock </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SubsidiarySaleOfStockAxis_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Subsidiary Sale Of Stock [Axis] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="locator" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Sale of Stock </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IPOMember" xlink:type="locator" xlink:label="us-gaap_IPOMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IPOMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Public Offerings </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IPOMember" xlink:to="us-gaap_IPOMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IPOMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> I P O [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems" xlink:type="locator" xlink:label="us-gaap_StatementLineItems"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StatementLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Statement [Line Items] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementLineItems_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StatementLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Statement [Line Items] </link:label>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Beginning balance </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TemporaryEquitySharesOutstanding" xlink:type="locator" xlink:label="us-gaap_TemporaryEquitySharesOutstanding"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_TemporaryEquitySharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Beginning balance, shares </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TemporaryEquitySharesOutstanding" xlink:to="us-gaap_TemporaryEquitySharesOutstanding_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_TemporaryEquitySharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Temporary Equity Shares Outstanding </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TemporaryEquityCarryingAmountAttributableToParent" xlink:type="locator" xlink:label="us-gaap_TemporaryEquityCarryingAmountAttributableToParent"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_TemporaryEquityCarryingAmountAttributableToParent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Beginning balance </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TemporaryEquityCarryingAmountAttributableToParent" xlink:to="us-gaap_TemporaryEquityCarryingAmountAttributableToParent_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_TemporaryEquityCarryingAmountAttributableToParent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Temporary Equity Carrying Amount Attributable To Parent </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharesOutstanding" xlink:type="locator" xlink:label="us-gaap_SharesOutstanding"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Beginning balance, shares </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesOutstanding" xlink:to="us-gaap_SharesOutstanding_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Shares Outstanding </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues" xlink:type="locator" xlink:label="us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Issuance of convertible preferred stock, net of issuance costs </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues" xlink:to="us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Temporary Equity Stock Issued During Period Value New Issues </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues" xlink:type="locator" xlink:label="etnb_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues"/>

<link:label xml:lang="en-US" xlink:label="etnb_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Temporary equity, stock issued during period, shares, new issues. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues" xlink:to="etnb_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Issuance of convertible preferred stock, net of issuance costs, shares </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Temporary Equity Stock Issued During Period Shares New Issues </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Issuance of common stock </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period Value New Issues </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Issuance of common stock, shares </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period Shares New Issues </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Issuance of common stock upon exercise of stock options </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:to="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period Value Stock Options Exercised </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Issuance of common stock upon exercise of stock options, shares </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:to="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period Shares Stock Options Exercised </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Issuance of common stock upon ESPP purchase </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan" xlink:to="us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period Value Employee Stock Purchase Plan </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Issuance of common stock upon ESPP purchase, shares </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:to="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period Shares Employee Stock Purchase Plans </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_IssuanceOfCommonStockWarrantInConnectionWithTermLoanFacility_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Issuance of common stock warrant in connection with term loan facility </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_IssuanceOfCommonStockWarrantInConnectionWithTermLoanFacility_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Issuance Of Common Stock Warrant In Connection With Term Loan Facility </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Share-based compensation </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:to="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value </link:label>

<link:label xml:lang="en-US" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Net loss </link:label>

<link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other comprehensive loss </link:label>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Ending balance </link:label>

<link:label xml:lang="en-US" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Ending balance, shares </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_StockIssuedDuringPeriodIssuanceCosts" xlink:type="locator" xlink:label="etnb_StockIssuedDuringPeriodIssuanceCosts"/>

<link:label xml:lang="en-US" xlink:label="etnb_StockIssuedDuringPeriodIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Stock issued during period issuance costs. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_StockIssuedDuringPeriodIssuanceCosts" xlink:to="etnb_StockIssuedDuringPeriodIssuanceCosts_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_StockIssuedDuringPeriodIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stock Issued During Period Issuance Costs </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_TemporaryEquityIssuanceCosts" xlink:type="locator" xlink:label="etnb_TemporaryEquityIssuanceCosts"/>

<link:label xml:lang="en-US" xlink:label="etnb_TemporaryEquityIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Temporary equity, issuance costs. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_TemporaryEquityIssuanceCosts" xlink:to="etnb_TemporaryEquityIssuanceCosts_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_TemporaryEquityPartialSettlementOfConvertiblePreferredStockLiability" xlink:type="locator" xlink:label="etnb_TemporaryEquityPartialSettlementOfConvertiblePreferredStockLiability"/>

<link:label xml:lang="en-US" xlink:label="etnb_TemporaryEquityPartialSettlementOfConvertiblePreferredStockLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Temporary equity, partial settlement of convertible preferred stock liability. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_TemporaryEquityPartialSettlementOfConvertiblePreferredStockLiability" xlink:to="etnb_TemporaryEquityPartialSettlementOfConvertiblePreferredStockLiability_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_TemporaryEquityIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Temporary equity, issuance costs </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_TemporaryEquityIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Temporary Equity Issuance Costs </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_TemporaryEquityPartialSettlementOfConvertiblePreferredStockLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Temporary equity, partial settlement of convertible preferred stock liability </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_TemporaryEquityPartialSettlementOfConvertiblePreferredStockLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Temporary Equity Partial Settlement Of Convertible Preferred Stock Liability </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_DeferredTaxAssets" xlink:type="locator" xlink:label="etnb_DeferredTaxAssets"/>

<link:label xml:lang="en-US" xlink:label="etnb_DeferredTaxAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Deferred tax assets. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_DeferredTaxAssets" xlink:to="etnb_DeferredTaxAssets_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_RevaluationOfConvertiblePreferredStockLiability" xlink:type="locator" xlink:label="etnb_RevaluationOfConvertiblePreferredStockLiability"/>

<link:label xml:lang="en-US" xlink:label="etnb_RevaluationOfConvertiblePreferredStockLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Revaluation of convertible preferred stock liability. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_RevaluationOfConvertiblePreferredStockLiability" xlink:to="etnb_RevaluationOfConvertiblePreferredStockLiability_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_PaymentOfDeferredOfferingCosts" xlink:type="locator" xlink:label="etnb_PaymentOfDeferredOfferingCosts"/>

<link:label xml:lang="en-US" xlink:label="etnb_PaymentOfDeferredOfferingCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Payment of deferred offering costs. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_PaymentOfDeferredOfferingCosts" xlink:to="etnb_PaymentOfDeferredOfferingCosts_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_DeferredOfferingCostsIncludedInAccountsPayableAndAccruedExpenses" xlink:type="locator" xlink:label="etnb_DeferredOfferingCostsIncludedInAccountsPayableAndAccruedExpenses"/>

<link:label xml:lang="en-US" xlink:label="etnb_DeferredOfferingCostsIncludedInAccountsPayableAndAccruedExpenses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Deferred offering costs included in accounts payable and accrued expenses. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_DeferredOfferingCostsIncludedInAccountsPayableAndAccruedExpenses" xlink:to="etnb_DeferredOfferingCostsIncludedInAccountsPayableAndAccruedExpenses_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:type="locator" xlink:label="us-gaap_StatementOfCashFlowsAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Statement Of Cash Flows [Abstract] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_StatementOfCashFlowsAbstract_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeStockMember" xlink:type="locator" xlink:label="us-gaap_EmployeeStockMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> ESPP Purchase </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeStockMember" xlink:to="us-gaap_EmployeeStockMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Employee Stock [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cash flows from operating activities: </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Provided By Used In Operating Activities [Abstract] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProfitLoss" xlink:type="locator" xlink:label="us-gaap_ProfitLoss"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ProfitLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Net loss </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProfitLoss" xlink:to="us-gaap_ProfitLoss_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ProfitLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Profit Loss </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Adjustments to reconcile net loss to net cash used in operating activities: </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Depreciation" xlink:type="locator" xlink:label="us-gaap_Depreciation"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_Depreciation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Depreciation </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Depreciation" xlink:to="us-gaap_Depreciation_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_Depreciation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Depreciation </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensation"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Share-based compensation </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensation" xlink:to="us-gaap_ShareBasedCompensation_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_DeferredTaxAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Deferred tax assets </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_DeferredTaxAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Deferred Tax Assets </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_RevaluationOfConvertiblePreferredStockLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Revaluation of convertible preferred stock liability </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_RevaluationOfConvertiblePreferredStockLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Revaluation Of Convertible Preferred Stock Liability </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:type="locator" xlink:label="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Amortization of premium on available-for-sale securities </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:to="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Accretion Amortization Of Discounts And Premiums Investments </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:type="locator" xlink:label="us-gaap_AmortizationOfFinancingCosts"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Amortization of debt issuance costs </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfFinancingCosts" xlink:to="us-gaap_AmortizationOfFinancingCosts_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Amortization Of Financing Costs </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Changes in operating assets and liabilities: </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Increase Decrease In Operating Capital [Abstract] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Prepaid and other current assets </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:to="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Increase Decrease In Prepaid Deferred Expense And Other Assets </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accounts payable </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsPayable" xlink:to="us-gaap_IncreaseDecreaseInAccountsPayable_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accrued expenses </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:to="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Net cash used in operating activities </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Provided By Used In Operating Activities </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cash flows from investing activities: </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Provided By Used In Investing Activities [Abstract] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecurities" xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquireAvailableForSaleSecurities"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquireAvailableForSaleSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Purchases of available-for-sale securities </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireAvailableForSaleSecurities" xlink:to="us-gaap_PaymentsToAcquireAvailableForSaleSecurities_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquireAvailableForSaleSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Payments To Acquire Available For Sale Securities </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities" xlink:type="locator" xlink:label="us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Proceeds from maturities of available-for-sale securities </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities" xlink:to="us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Proceeds From Sale And Maturity Of Available For Sale Securities </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Purchases of property and equipment </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Payments To Acquire Property Plant And Equipment </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Net cash used in investing activities </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Provided By Used In Investing Activities </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cash flows from financing activities: </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Provided By Used In Financing Activities [Abstract] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromIssuanceInitialPublicOffering" xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceInitialPublicOffering"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceInitialPublicOffering_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Proceeds from issuance of common stock upon public offering, net of issuance costs </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceInitialPublicOffering" xlink:to="us-gaap_ProceedsFromIssuanceInitialPublicOffering_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceInitialPublicOffering_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Proceeds From Issuance Initial Public Offering </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock" xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Proceeds from issuance of convertible preferred stock and convertible preferred stock liability, net of issuance cost </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock" xlink:to="us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Proceeds From Issuance Of Convertible Preferred Stock </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions" xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Proceeds from issuance of common stock upon stock option exercises </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions" xlink:to="us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Proceeds from issuance of common stock </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:to="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Proceeds From Issuance Of Common Stock </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:type="locator" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Payment of debt issuance costs </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfDebtIssuanceCosts" xlink:to="us-gaap_PaymentsOfDebtIssuanceCosts_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Payments Of Debt Issuance Costs </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_PaymentOfDeferredOfferingCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Payment of deferred offering costs </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_PaymentOfDeferredOfferingCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Payment Of Deferred Offering Costs </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Net cash provided by financing activities </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Net Cash Provided By Used In Financing Activities </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:type="locator" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Net increase in cash and cash equivalents, and restricted cash </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:type="locator" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Cash and cash equivalents, and restricted cash at beginning of period </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents </link:label>

<link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Cash and cash equivalents, and restricted cash at end of period </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract" xlink:type="locator" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Components of cash and cash equivalents, and restricted cash: </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalents" xlink:type="locator" xlink:label="us-gaap_RestrictedCashAndCashEquivalents"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedCashAndCashEquivalents_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Restricted cash </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedCashAndCashEquivalents" xlink:to="us-gaap_RestrictedCashAndCashEquivalents_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NoncashInvestingAndFinancingItemsAbstract" xlink:type="locator" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Supplemental cash flow disclosures: </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncashInvestingAndFinancingItemsAbstract" xlink:to="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Noncash Investing And Financing Items [Abstract] </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_DeferredOfferingCostsIncludedInAccountsPayableAndAccruedExpenses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Deferred offering costs included in accounts payable and accrued expenses </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_DeferredOfferingCostsIncludedInAccountsPayableAndAccruedExpenses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Deferred Offering Costs Included In Accounts Payable And Accrued Expenses </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxesPaidNet" xlink:type="locator" xlink:label="us-gaap_IncomeTaxesPaidNet"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cash paid for taxes </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxesPaidNet" xlink:to="us-gaap_IncomeTaxesPaidNet_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Income Taxes Paid Net </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:type="locator" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Organization Consolidation And Presentation Of Financial Statements [Abstract] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:to="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:type="locator" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Organization and Basis of Presentation </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:to="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:type="locator" xlink:label="us-gaap_AccountingPoliciesAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AccountingPoliciesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Accounting Policies [Abstract] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_AccountingPoliciesAbstract_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SignificantAccountingPoliciesTextBlock" xlink:type="locator" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Summary of Significant Accounting Policies </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SignificantAccountingPoliciesTextBlock" xlink:to="us-gaap_SignificantAccountingPoliciesTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Significant Accounting Policies [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:type="locator" xlink:label="us-gaap_FairValueDisclosuresAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueDisclosuresAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Disclosures [Abstract] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueDisclosuresAbstract_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueDisclosuresTextBlock" xlink:type="locator" xlink:label="us-gaap_FairValueDisclosuresTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair Value Measurements </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueDisclosuresTextBlock" xlink:to="us-gaap_FairValueDisclosuresTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Disclosures [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BalanceSheetRelatedDisclosuresAbstract" xlink:type="locator" xlink:label="us-gaap_BalanceSheetRelatedDisclosuresAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_BalanceSheetRelatedDisclosuresAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Balance Sheet Related Disclosures [Abstract] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BalanceSheetRelatedDisclosuresAbstract" xlink:to="us-gaap_BalanceSheetRelatedDisclosuresAbstract_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SupplementalBalanceSheetDisclosuresTextBlock" xlink:type="locator" xlink:label="us-gaap_SupplementalBalanceSheetDisclosuresTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SupplementalBalanceSheetDisclosuresTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Consolidated Balance Sheet Components </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SupplementalBalanceSheetDisclosuresTextBlock" xlink:to="us-gaap_SupplementalBalanceSheetDisclosuresTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SupplementalBalanceSheetDisclosuresTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Supplemental Balance Sheet Disclosures [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:type="locator" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Commitments And Contingencies Disclosure [Abstract] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:to="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:type="locator" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Commitments and Contingencies </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:to="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Commitments And Contingencies Disclosure [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:type="locator" xlink:label="us-gaap_DebtDisclosureAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DebtDisclosureAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Disclosure [Abstract] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtDisclosureAbstract" xlink:to="us-gaap_DebtDisclosureAbstract_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtTextBlock" xlink:type="locator" xlink:label="us-gaap_LongTermDebtTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Term Loan </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtTextBlock" xlink:to="us-gaap_LongTermDebtTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Long Term Debt [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityAbstract" xlink:type="locator" xlink:label="us-gaap_EquityAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_EquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Equity [Abstract] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_EquityAbstract_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock" xlink:type="locator" xlink:label="us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stockholders' Equity </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock" xlink:to="us-gaap_ShareholdersEquityAndShareBasedPaymentsTextBlock_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:type="locator" xlink:label="us-gaap_EarningsPerShareAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Earnings Per Share [Abstract] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareAbstract" xlink:to="us-gaap_EarningsPerShareAbstract_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareTextBlock" xlink:type="locator" xlink:label="us-gaap_EarningsPerShareTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Net Loss Per Share </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareTextBlock" xlink:to="us-gaap_EarningsPerShareTextBlock_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionsAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Related Party Transactions [Abstract] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="us-gaap_RelatedPartyTransactionsAbstract_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Related Party Transactions </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:to="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Related Party Transactions Disclosure [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Unaudited Condensed Consolidated Financial Statements </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:to="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Basis Of Accounting Policy Policy [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConsolidationPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_ConsolidationPolicyTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ConsolidationPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Principles of Consolidation </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConsolidationPolicyTextBlock" xlink:to="us-gaap_ConsolidationPolicyTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ConsolidationPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Consolidation Policy [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UseOfEstimates" xlink:type="locator" xlink:label="us-gaap_UseOfEstimates"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Use of Estimates </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UseOfEstimates" xlink:to="us-gaap_UseOfEstimates_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Use Of Estimates </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InvestmentPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_InvestmentPolicyTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Investments </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentPolicyTextBlock" xlink:to="us-gaap_InvestmentPolicyTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Investment Policy [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementPolicyPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementPolicyPolicyTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementPolicyPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair Value Measurements </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementPolicyPolicyTextBlock" xlink:to="us-gaap_FairValueMeasurementPolicyPolicyTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementPolicyPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Measurement Policy Policy [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cash and Cash Equivalents </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:to="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cash And Cash Equivalents Policy [Text Block] </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_ConvertiblePreferredStockLiabilityPolicyTextBlock" xlink:type="locator" xlink:label="etnb_ConvertiblePreferredStockLiabilityPolicyTextBlock"/>

<link:label xml:lang="en-US" xlink:label="etnb_ConvertiblePreferredStockLiabilityPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Convertible preferred stock liability. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_ConvertiblePreferredStockLiabilityPolicyTextBlock" xlink:to="etnb_ConvertiblePreferredStockLiabilityPolicyTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_ConvertiblePreferredStockLiabilityPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Convertible Preferred Stock Liability </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_ConvertiblePreferredStockLiabilityPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Convertible Preferred Stock Liability Policy [Text Block] </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_RiskAndUncertaintiesPolicyPolicyTextBlock" xlink:type="locator" xlink:label="etnb_RiskAndUncertaintiesPolicyPolicyTextBlock"/>

<link:label xml:lang="en-US" xlink:label="etnb_RiskAndUncertaintiesPolicyPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Risk and uncertainties policy. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_RiskAndUncertaintiesPolicyPolicyTextBlock" xlink:to="etnb_RiskAndUncertaintiesPolicyPolicyTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_RiskAndUncertaintiesPolicyPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Risk and Uncertainties </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_RiskAndUncertaintiesPolicyPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Risk And Uncertainties Policy Policy [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ComprehensiveIncomePolicyPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_ComprehensiveIncomePolicyPolicyTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ComprehensiveIncomePolicyPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Comprehensive Loss </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ComprehensiveIncomePolicyPolicyTextBlock" xlink:to="us-gaap_ComprehensiveIncomePolicyPolicyTextBlock_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_RecentlyAdoptedAccountingPronouncementPolicyTextBlock" xlink:type="locator" xlink:label="etnb_RecentlyAdoptedAccountingPronouncementPolicyTextBlock"/>

<link:label xml:lang="en-US" xlink:label="etnb_RecentlyAdoptedAccountingPronouncementPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Recently adopted accounting pronouncement policy. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_RecentlyAdoptedAccountingPronouncementPolicyTextBlock" xlink:to="etnb_RecentlyAdoptedAccountingPronouncementPolicyTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_RecentlyAdoptedAccountingPronouncementPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Recently Adopted Accounting Pronouncement </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_RecentlyAdoptedAccountingPronouncementPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Recently Adopted Accounting Pronouncement Policy [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Recent Accounting Pronouncements </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:to="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> New Accounting Pronouncements Policy Policy [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Summary of Financial Assets Measured at Fair Value on Recurring Basis </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock" xlink:to="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis Table [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock" xlink:type="locator" xlink:label="us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule of Contractual Maturities of Available-for-Sale Securities </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock" xlink:to="us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Investments Classified By Contractual Maturity Date Table [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:type="locator" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Summary of Changes in Fair Value of Level 3 Liability </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:to="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Summary of Fair Value Assumptions </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques Table [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule of Accrued Expenses </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock" xlink:to="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Accrued Liabilities Table [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule of Future Minimum Lease Payments Under Non-cancellable Operating Lease Obligations </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock" xlink:to="us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Future Minimum Rental Payments For Operating Leases Table [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Summary of Share-Based Compensation </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:to="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Summary of Estimated Fair Value of Option Awards Granted Using Black-Scholes Option-Pricing Model </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Share Based Payment Award Stock Options Valuation Assumptions Table [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Summary of Stock Option Activity </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Share Based Compensation Stock Options Activity Table [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule of Outstanding Potentially Dilutive Securities Excluded From Calculation of Diluted Net Loss </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock" xlink:to="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Text Block] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable" xlink:type="locator" xlink:label="us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Subsidiary Or Equity Method Investee Sale Of Stock By Subsidiary Or Equity Investee [Table] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable" xlink:to="us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Subsidiary Or Equity Method Investee Sale Of Stock By Subsidiary Or Equity Investee [Table] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OverAllotmentOptionMember" xlink:type="locator" xlink:label="us-gaap_OverAllotmentOptionMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OverAllotmentOptionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Underwriters option </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OverAllotmentOptionMember" xlink:to="us-gaap_OverAllotmentOptionMember_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_UnderwrittenPublicOfferingMember" xlink:type="locator" xlink:label="etnb_UnderwrittenPublicOfferingMember"/>

<link:label xml:lang="en-US" xlink:label="etnb_UnderwrittenPublicOfferingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Underwritten Public Offering [Member] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_UnderwrittenPublicOfferingMember" xlink:to="etnb_UnderwrittenPublicOfferingMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_UnderwrittenPublicOfferingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Underwritten public offering </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_UnderwrittenPublicOfferingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Underwritten Public Offering [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsidiarySaleOfStockLineItems" xlink:type="locator" xlink:label="us-gaap_SubsidiarySaleOfStockLineItems"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SubsidiarySaleOfStockLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Subsidiary Sale Of Stock [Line Items] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsidiarySaleOfStockLineItems" xlink:to="us-gaap_SubsidiarySaleOfStockLineItems_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SubsidiarySaleOfStockLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Subsidiary Sale Of Stock [Line Items] </link:label>

<link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityIncorporationDateOfIncorporation" xlink:type="locator" xlink:label="dei_EntityIncorporationDateOfIncorporation"/>

<link:label xml:lang="en-US" xlink:label="dei_EntityIncorporationDateOfIncorporation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Date of incorporation </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationDateOfIncorporation" xlink:to="dei_EntityIncorporationDateOfIncorporation_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_ReorganizationExchangeOfEquityPercentageOfCommonStockIssuedUponExchange" xlink:type="locator" xlink:label="etnb_ReorganizationExchangeOfEquityPercentageOfCommonStockIssuedUponExchange"/>

<link:label xml:lang="en-US" xlink:label="etnb_ReorganizationExchangeOfEquityPercentageOfCommonStockIssuedUponExchange_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Reorganization exchange of equity percentage of common stock issued upon exchange. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_ReorganizationExchangeOfEquityPercentageOfCommonStockIssuedUponExchange" xlink:to="etnb_ReorganizationExchangeOfEquityPercentageOfCommonStockIssuedUponExchange_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_ReorganizationExchangeOfEquityPercentageOfOrdinarySharesExchanged" xlink:type="locator" xlink:label="etnb_ReorganizationExchangeOfEquityPercentageOfOrdinarySharesExchanged"/>

<link:label xml:lang="en-US" xlink:label="etnb_ReorganizationExchangeOfEquityPercentageOfOrdinarySharesExchanged_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Reorganization exchange of equity percentage of ordinary shares exchanged. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_ReorganizationExchangeOfEquityPercentageOfOrdinarySharesExchanged" xlink:to="etnb_ReorganizationExchangeOfEquityPercentageOfOrdinarySharesExchanged_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_ReorganizationExchangeOfEquityPercentageOfCommonStockIssuedUponExchange_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Reorganization exchange of equity percentage of ordinary shares exchanged </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_ReorganizationExchangeOfEquityPercentageOfCommonStockIssuedUponExchange_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Reorganization Exchange Of Equity Percentage Of Common Stock Issued Upon Exchange </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_ReorganizationExchangeOfEquityPercentageOfOrdinarySharesExchanged_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Reorganization exchange of equity percentage of common stock issued upon exchange </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_ReorganizationExchangeOfEquityPercentageOfOrdinarySharesExchanged_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Reorganization Exchange Of Equity Percentage Of Ordinary Shares Exchanged </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_PaymentsOfStockIssuanceCostsOther" xlink:type="locator" xlink:label="etnb_PaymentsOfStockIssuanceCostsOther"/>

<link:label xml:lang="en-US" xlink:label="etnb_PaymentsOfStockIssuanceCostsOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Payments of stock issuance costs, other. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_PaymentsOfStockIssuanceCostsOther" xlink:to="etnb_PaymentsOfStockIssuanceCostsOther_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Shares issued and sold </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharesIssuedPricePerShare" xlink:type="locator" xlink:label="us-gaap_SharesIssuedPricePerShare"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> IPO price per share </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesIssuedPricePerShare" xlink:to="us-gaap_SharesIssuedPricePerShare_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Proceeds from issuance of common stock, net of underwriters discount and commissions </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsOfStockIssuanceCosts" xlink:type="locator" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Payment of underwriting discounts, commissions </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfStockIssuanceCosts" xlink:to="us-gaap_PaymentsOfStockIssuanceCosts_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Payments Of Stock Issuance Costs </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_PaymentsOfStockIssuanceCostsOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Other offering expenses </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_PaymentsOfStockIssuanceCostsOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Payments Of Stock Issuance Costs Other </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion" xlink:type="locator" xlink:label="us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Convertible preferred stock automatically converted into common stock </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion" xlink:to="us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Convertible Preferred Stock Shares Issued Upon Conversion </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" xlink:type="locator" xlink:label="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Reverse stock split conversion ratio </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" xlink:to="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stockholders Equity Note Stock Split Conversion Ratio1 </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashCashEquivalentsAndShortTermInvestments" xlink:type="locator" xlink:label="us-gaap_CashCashEquivalentsAndShortTermInvestments"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsAndShortTermInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cash equivalents and short-term investments </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsAndShortTermInvestments" xlink:to="us-gaap_CashCashEquivalentsAndShortTermInvestments_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsAndShortTermInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cash Cash Equivalents And Short Term Investments </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_ProceedsFromIssuanceOfCommonStockGross" xlink:type="locator" xlink:label="etnb_ProceedsFromIssuanceOfCommonStockGross"/>

<link:label xml:lang="en-US" xlink:label="etnb_ProceedsFromIssuanceOfCommonStockGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Proceeds from issuance of common stock gross. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_ProceedsFromIssuanceOfCommonStockGross" xlink:to="etnb_ProceedsFromIssuanceOfCommonStockGross_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_ProceedsFromIssuanceOfCommonStockGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Gross proceeds from issue of common stock </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_ProceedsFromIssuanceOfCommonStockGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Proceeds From Issuance Of Common Stock Gross </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:type="locator" xlink:label="us-gaap_RealizedInvestmentGainsLosses"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_RealizedInvestmentGainsLosses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Realized gains or losses on investments </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealizedInvestmentGainsLosses" xlink:to="us-gaap_RealizedInvestmentGainsLosses_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_RealizedInvestmentGainsLosses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Realized Investment Gains Losses </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_CapitalContributionsRelatedToExtinguishmentOfPreferredStockLiability" xlink:type="locator" xlink:label="etnb_CapitalContributionsRelatedToExtinguishmentOfPreferredStockLiability"/>

<link:label xml:lang="en-US" xlink:label="etnb_CapitalContributionsRelatedToExtinguishmentOfPreferredStockLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Capital contributions related to extinguishment of preferred stock liability. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_CapitalContributionsRelatedToExtinguishmentOfPreferredStockLiability" xlink:to="etnb_CapitalContributionsRelatedToExtinguishmentOfPreferredStockLiability_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_CapitalContributionsRelatedToExtinguishmentOfPreferredStockLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Capital contribution by the preferred stockholders </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_CapitalContributionsRelatedToExtinguishmentOfPreferredStockLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Capital Contributions Related To Extinguishment Of Preferred Stock Liability </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountingStandardsUpdateExtensibleList" xlink:type="locator" xlink:label="us-gaap_AccountingStandardsUpdateExtensibleList"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AccountingStandardsUpdateExtensibleList_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accounting Standards Update [Extensible List] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountingStandardsUpdateExtensibleList" xlink:to="us-gaap_AccountingStandardsUpdateExtensibleList_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AccountingStandardsUpdateExtensibleList_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Accounting Standards Update Extensible List </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdopted" xlink:type="locator" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdopted"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdopted_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Change in Accounting Principle, Accounting Standards Update, Adopted </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdopted" xlink:to="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdopted_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdopted_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Change In Accounting Principle Accounting Standards Update Adopted </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdoptionDate" xlink:type="locator" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdoptionDate"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdoptionDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Change In Accounting Principle Accounting Standards Update Adoption Date </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdoptionDate" xlink:to="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdoptionDate_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdoptionDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Change In Accounting Principle Accounting Standards Update Adoption Date </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateImmaterialEffect" xlink:type="locator" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateImmaterialEffect"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateImmaterialEffect_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Change In Accounting Principle Accounting Standards Update Immaterial Effect </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateImmaterialEffect" xlink:to="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateImmaterialEffect_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateImmaterialEffect_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Change In Accounting Principle Accounting Standards Update Immaterial Effect </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:type="locator" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Measurement Frequency </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByMeasurementFrequencyAxis" xlink:to="us-gaap_FairValueByMeasurementFrequencyAxis_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Measurement Frequency </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementFrequencyDomain" xlink:to="us-gaap_FairValueMeasurementFrequencyDomain_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementsRecurringMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Recurring </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementsRecurringMember" xlink:to="us-gaap_FairValueMeasurementsRecurringMember_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:type="locator" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair Value Hierarchy and NAV </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value By Fair Value Hierarchy Level [Axis] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair Value Hierarchy and NAV </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Measurements Fair Value Hierarchy [Domain] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:type="locator" xlink:label="us-gaap_FairValueInputsLevel1Member"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Level 1 </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel1Member" xlink:to="us-gaap_FairValueInputsLevel1Member_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Inputs Level1 [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:type="locator" xlink:label="us-gaap_FairValueInputsLevel2Member"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Level 2 </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel2Member" xlink:to="us-gaap_FairValueInputsLevel2Member_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Inputs Level2 [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InvestmentTypeAxis" xlink:type="locator" xlink:label="us-gaap_InvestmentTypeAxis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Investment Type </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentTypeAxis" xlink:to="us-gaap_InvestmentTypeAxis_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Investment Type [Axis] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:type="locator" xlink:label="us-gaap_InvestmentTypeCategorizationMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentTypeCategorizationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Investments </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_InvestmentTypeCategorizationMember_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MoneyMarketFundsMember" xlink:type="locator" xlink:label="us-gaap_MoneyMarketFundsMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_MoneyMarketFundsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Money Market Funds </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MoneyMarketFundsMember" xlink:to="us-gaap_MoneyMarketFundsMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_MoneyMarketFundsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Money Market Funds [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommercialPaperMember" xlink:type="locator" xlink:label="us-gaap_CommercialPaperMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CommercialPaperMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Commercial Paper </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommercialPaperMember" xlink:to="us-gaap_CommercialPaperMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CommercialPaperMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Commercial Paper [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AgencySecuritiesMember" xlink:type="locator" xlink:label="us-gaap_AgencySecuritiesMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AgencySecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Agency bonds </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AgencySecuritiesMember" xlink:to="us-gaap_AgencySecuritiesMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AgencySecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Agency Securities [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CorporateDebtSecuritiesMember" xlink:type="locator" xlink:label="us-gaap_CorporateDebtSecuritiesMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CorporateDebtSecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Corporate Debt </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CorporateDebtSecuritiesMember" xlink:to="us-gaap_CorporateDebtSecuritiesMember_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_USGovernmentAgenciesShorttermDebtSecuritiesMember" xlink:type="locator" xlink:label="us-gaap_USGovernmentAgenciesShorttermDebtSecuritiesMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_USGovernmentAgenciesShorttermDebtSecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> U.S. government bonds </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_USGovernmentAgenciesShorttermDebtSecuritiesMember" xlink:to="us-gaap_USGovernmentAgenciesShorttermDebtSecuritiesMember_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_USTreasuryBillSecuritiesMember" xlink:type="locator" xlink:label="us-gaap_USTreasuryBillSecuritiesMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_USTreasuryBillSecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> U.S. treasury bills </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_USTreasuryBillSecuritiesMember" xlink:to="us-gaap_USTreasuryBillSecuritiesMember_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_AgencyDiscountSecuritiesMember" xlink:type="locator" xlink:label="etnb_AgencyDiscountSecuritiesMember"/>

<link:label xml:lang="en-US" xlink:label="etnb_AgencyDiscountSecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Agency discount securities. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_AgencyDiscountSecuritiesMember" xlink:to="etnb_AgencyDiscountSecuritiesMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_AgencyDiscountSecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Agency discount securities </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_AgencyDiscountSecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Agency Discount Securities [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MunicipalBondsMember" xlink:type="locator" xlink:label="us-gaap_MunicipalBondsMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_MunicipalBondsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Municipal Bonds </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MunicipalBondsMember" xlink:to="us-gaap_MunicipalBondsMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_MunicipalBondsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Municipal Bonds [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashEquivalentsMember" xlink:type="locator" xlink:label="us-gaap_CashEquivalentsMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CashEquivalentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Cash equivalents </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashEquivalentsMember" xlink:to="us-gaap_CashEquivalentsMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CashEquivalentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Cash Equivalents [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermInvestmentsMember" xlink:type="locator" xlink:label="us-gaap_ShortTermInvestmentsMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermInvestmentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Short-term investments </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermInvestmentsMember" xlink:to="us-gaap_ShortTermInvestmentsMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermInvestmentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Short Term Investments [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis" xlink:type="locator" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Short-term investments, Amortized Cost </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis" xlink:to="us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Available For Sale Debt Securities Amortized Cost Basis </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax" xlink:type="locator" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Short-term investments, Gross Unrealized Holding Gains </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax" xlink:to="us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" xlink:type="locator" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Short-term investments, Gross Unrealized Holding Losses </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" xlink:to="us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:type="locator" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Short-term investments, Aggregated Fair Value </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:to="us-gaap_AvailableForSaleSecuritiesDebtSecurities_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Available For Sale Securities Debt Securities </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughTwoYearsFairValue" xlink:type="locator" xlink:label="etnb_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughTwoYearsFairValue"/>

<link:label xml:lang="en-US" xlink:label="etnb_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughTwoYearsFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Available for sale securities debt maturities after one through two years fair value. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughTwoYearsFairValue" xlink:to="etnb_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughTwoYearsFairValue_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue" xlink:type="locator" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Within one year </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue" xlink:to="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughTwoYearsFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> After one year through two years </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughTwoYearsFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Available For Sale Securities Debt Maturities After One Through Two Years Fair Value </link:label>

<link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total cash equivalents and available-for-sale securities </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:type="locator" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:to="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:type="locator" xlink:label="us-gaap_FairValueInputsLevel3Member"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Level 3 </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel3Member" xlink:to="us-gaap_FairValueInputsLevel3Member_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Inputs Level3 [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:type="locator" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair value measurement, financial liability </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair value measurement, financial assets </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_FairValueMeasurementWithUnobservableInputsReconciliationPartialSettlementOfConvertiblePreferredStockLiabilitySubsequentClosings" xlink:type="locator" xlink:label="etnb_FairValueMeasurementWithUnobservableInputsReconciliationPartialSettlementOfConvertiblePreferredStockLiabilitySubsequentClosings"/>

<link:label xml:lang="en-US" xlink:label="etnb_FairValueMeasurementWithUnobservableInputsReconciliationPartialSettlementOfConvertiblePreferredStockLiabilitySubsequentClosings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Fair Value Measurement With Unobservable Inputs Reconciliation Partial Settlement Of Convertible Preferred Stock Liability Subsequent Closings. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_FairValueMeasurementWithUnobservableInputsReconciliationPartialSettlementOfConvertiblePreferredStockLiabilitySubsequentClosings" xlink:to="etnb_FairValueMeasurementWithUnobservableInputsReconciliationPartialSettlementOfConvertiblePreferredStockLiabilitySubsequentClosings_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Beginning balance </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Revaluation of convertible preferred stock liability recorded in other expenses, net </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_FairValueMeasurementWithUnobservableInputsReconciliationPartialSettlementOfConvertiblePreferredStockLiabilitySubsequentClosings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Partial settlement of convertible preferred stock liability in subsequent closings </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_FairValueMeasurementWithUnobservableInputsReconciliationPartialSettlementOfConvertiblePreferredStockLiabilitySubsequentClosings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Measurement With Unobservable Inputs Reconciliation Partial Settlement Of Convertible Preferred Stock Liability Subsequent Closings </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Table] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Table] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByLiabilityClassAxis" xlink:type="locator" xlink:label="us-gaap_FairValueByLiabilityClassAxis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByLiabilityClassAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Liability Class </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByLiabilityClassAxis" xlink:to="us-gaap_FairValueByLiabilityClassAxis_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:type="locator" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair Value by Liability Class </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:to="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class [Domain] </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_ConvertiblePreferredStockLiabilityMember" xlink:type="locator" xlink:label="etnb_ConvertiblePreferredStockLiabilityMember"/>

<link:label xml:lang="en-US" xlink:label="etnb_ConvertiblePreferredStockLiabilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Convertible preferred stock liability. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_ConvertiblePreferredStockLiabilityMember" xlink:to="etnb_ConvertiblePreferredStockLiabilityMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_ConvertiblePreferredStockLiabilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Convertible Preferred Stock Liability </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_ConvertiblePreferredStockLiabilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Convertible Preferred Stock Liability [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationTechniqueAxis" xlink:type="locator" xlink:label="us-gaap_ValuationTechniqueAxis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ValuationTechniqueAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Valuation Approach and Technique </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ValuationTechniqueAxis" xlink:to="us-gaap_ValuationTechniqueAxis_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ValuationTechniqueAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Valuation Technique [Axis] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationTechniqueDomain" xlink:type="locator" xlink:label="us-gaap_ValuationTechniqueDomain"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ValuationTechniqueDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Valuation Approach and Technique </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ValuationTechniqueDomain" xlink:to="us-gaap_ValuationTechniqueDomain_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ValuationTechniqueDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Valuation Technique [Domain] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationTechniqueOptionPricingModelMember" xlink:type="locator" xlink:label="us-gaap_ValuationTechniqueOptionPricingModelMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ValuationTechniqueOptionPricingModelMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Black Scholes Option Pricing Model </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ValuationTechniqueOptionPricingModelMember" xlink:to="us-gaap_ValuationTechniqueOptionPricingModelMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ValuationTechniqueOptionPricingModelMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Valuation Technique Option Pricing Model [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MeasurementInputTypeAxis" xlink:type="locator" xlink:label="us-gaap_MeasurementInputTypeAxis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Measurement Input Type </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputTypeAxis" xlink:to="us-gaap_MeasurementInputTypeAxis_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Measurement Input Type [Axis] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MeasurementInputTypeDomain" xlink:type="locator" xlink:label="us-gaap_MeasurementInputTypeDomain"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Measurement Input Type </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputTypeDomain_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Measurement Input Type [Domain] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MeasurementInputSharePriceMember" xlink:type="locator" xlink:label="us-gaap_MeasurementInputSharePriceMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputSharePriceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock Price </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputSharePriceMember" xlink:to="us-gaap_MeasurementInputSharePriceMember_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MeasurementInputExercisePriceMember" xlink:type="locator" xlink:label="us-gaap_MeasurementInputExercisePriceMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputExercisePriceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Exercise Price </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputExercisePriceMember" xlink:to="us-gaap_MeasurementInputExercisePriceMember_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MeasurementInputExpectedTermMember" xlink:type="locator" xlink:label="us-gaap_MeasurementInputExpectedTermMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputExpectedTermMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Expected Term (Years) </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputExpectedTermMember" xlink:to="us-gaap_MeasurementInputExpectedTermMember_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MeasurementInputPriceVolatilityMember" xlink:type="locator" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Expected Volatility </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputPriceVolatilityMember" xlink:to="us-gaap_MeasurementInputPriceVolatilityMember_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MeasurementInputRiskFreeInterestRateMember" xlink:type="locator" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Risk-free Interest Rate </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputRiskFreeInterestRateMember" xlink:to="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Measurement Input Risk Free Interest Rate [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis" xlink:type="locator" xlink:label="srt_RangeAxis"/>

<link:label xml:lang="en-US" xlink:label="srt_RangeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Statistical Measurement </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeAxis" xlink:to="srt_RangeAxis_lbl"/>

<link:label xml:lang="en-US" xlink:label="srt_RangeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Range [Axis] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember" xlink:type="locator" xlink:label="srt_RangeMember"/>

<link:label xml:lang="en-US" xlink:label="srt_RangeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Statistical Measurement </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeMember" xlink:to="srt_RangeMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="srt_RangeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Range [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MinimumMember" xlink:type="locator" xlink:label="srt_MinimumMember"/>

<link:label xml:lang="en-US" xlink:label="srt_MinimumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Minimum </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MinimumMember" xlink:to="srt_MinimumMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="srt_MinimumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Minimum [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MaximumMember" xlink:type="locator" xlink:label="srt_MaximumMember"/>

<link:label xml:lang="en-US" xlink:label="srt_MaximumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Maximum </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MaximumMember" xlink:to="srt_MaximumMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="srt_MaximumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Maximum [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentMeasurementInput" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentMeasurementInput"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentMeasurementInput_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair Measurement Input </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentMeasurementInput" xlink:to="us-gaap_DebtInstrumentMeasurementInput_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentMeasurementInput_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Instrument Measurement Input </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentTerm" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentTerm"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair Measurement Input </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentTerm" xlink:to="us-gaap_DebtInstrumentTerm_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Instrument Term </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_AccruedResearchAndDevelopmentExpenseCurrent" xlink:type="locator" xlink:label="etnb_AccruedResearchAndDevelopmentExpenseCurrent"/>

<link:label xml:lang="en-US" xlink:label="etnb_AccruedResearchAndDevelopmentExpenseCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Accrued research and development expense current. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_AccruedResearchAndDevelopmentExpenseCurrent" xlink:to="etnb_AccruedResearchAndDevelopmentExpenseCurrent_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PayablesAndAccrualsAbstract" xlink:type="locator" xlink:label="us-gaap_PayablesAndAccrualsAbstract"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PayablesAndAccrualsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Payables And Accruals [Abstract] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PayablesAndAccrualsAbstract" xlink:to="us-gaap_PayablesAndAccrualsAbstract_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_AccruedResearchAndDevelopmentExpenseCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accrued research and development expense </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_AccruedResearchAndDevelopmentExpenseCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Accrued Research And Development Expense Current </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:type="locator" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accrued employee and related expenses </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:to="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Employee Related Liabilities Current </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccruedProfessionalFeesCurrent" xlink:type="locator" xlink:label="us-gaap_AccruedProfessionalFeesCurrent"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AccruedProfessionalFeesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accrued professional and legal fees </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedProfessionalFeesCurrent" xlink:to="us-gaap_AccruedProfessionalFeesCurrent_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AccruedProfessionalFeesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Accrued Professional Fees Current </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:type="locator" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Accrued other </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAccruedLiabilitiesCurrent" xlink:to="us-gaap_OtherAccruedLiabilitiesCurrent_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Remainder of 2020 </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> 2021 </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> 2022 </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel"> Total future minimum annual payments </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Operating Leases Future Minimum Payments Due </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LossContingenciesTable" xlink:type="locator" xlink:label="us-gaap_LossContingenciesTable"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LossContingenciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Loss Contingencies [Table] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingenciesTable" xlink:to="us-gaap_LossContingenciesTable_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LossContingenciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Loss Contingencies [Table] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TypeOfArrangementAxis" xlink:type="locator" xlink:label="us-gaap_TypeOfArrangementAxis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Collaborative Arrangement and Arrangement Other than Collaborative </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TypeOfArrangementAxis" xlink:to="us-gaap_TypeOfArrangementAxis_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Type Of Arrangement [Axis] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:type="locator" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Collaborative Arrangement and Arrangement Other than Collaborative </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:to="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Arrangements And Nonarrangement Transactions [Member] </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_TevaAgreementMember" xlink:type="locator" xlink:label="etnb_TevaAgreementMember"/>

<link:label xml:lang="en-US" xlink:label="etnb_TevaAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Teva agreement. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_TevaAgreementMember" xlink:to="etnb_TevaAgreementMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_TevaAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Teva Agreements </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_TevaAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Teva Agreement [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis" xlink:type="locator" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Research and Development Arrangement, Contract to Perform for Others, Type </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis" xlink:to="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Research And Development Arrangement Contract To Perform For Others By Type [Axis] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain" xlink:type="locator" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Research and Development Arrangement, Contract to Perform for Others, Type </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain" xlink:to="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Research And Development Arrangement Contract To Perform For Others Type [Domain] </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_TevasGlycoPEGylatedFGF21ProgramMember" xlink:type="locator" xlink:label="etnb_TevasGlycoPEGylatedFGF21ProgramMember"/>

<link:label xml:lang="en-US" xlink:label="etnb_TevasGlycoPEGylatedFGF21ProgramMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Tevas glycoPEGylated FGF21 program. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_TevasGlycoPEGylatedFGF21ProgramMember" xlink:to="etnb_TevasGlycoPEGylatedFGF21ProgramMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_TevasGlycoPEGylatedFGF21ProgramMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Teva's GlycoPEGylated FGF21 Program </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_TevasGlycoPEGylatedFGF21ProgramMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Tevas Glyco P E Gylated F G F21 Program [Member] </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_TevasDevelopmentProgramMember" xlink:type="locator" xlink:label="etnb_TevasDevelopmentProgramMember"/>

<link:label xml:lang="en-US" xlink:label="etnb_TevasDevelopmentProgramMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Tevas development program. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_TevasDevelopmentProgramMember" xlink:to="etnb_TevasDevelopmentProgramMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_TevasDevelopmentProgramMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Teva's Development Program </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_TevasDevelopmentProgramMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Tevas Development Program [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:type="locator" xlink:label="us-gaap_IncomeStatementLocationAxis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementLocationAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Income Statement Location </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationAxis_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementLocationAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Income Statement Location [Axis] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:type="locator" xlink:label="us-gaap_IncomeStatementLocationDomain"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementLocationDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Income Statement Location </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_IncomeStatementLocationDomain_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementLocationDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Income Statement Location [Domain] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:type="locator" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Research and Development Expenses </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentExpenseMember" xlink:to="us-gaap_ResearchAndDevelopmentExpenseMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Research And Development Expense [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LossContingenciesLineItems" xlink:type="locator" xlink:label="us-gaap_LossContingenciesLineItems"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LossContingenciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Loss Contingencies [Line Items] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingenciesLineItems" xlink:to="us-gaap_LossContingenciesLineItems_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LossContingenciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Loss Contingencies [Line Items] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LeaseAndRentalExpense" xlink:type="locator" xlink:label="us-gaap_LeaseAndRentalExpense"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LeaseAndRentalExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Operating leases, rent expense </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeaseAndRentalExpense" xlink:to="us-gaap_LeaseAndRentalExpense_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LeaseAndRentalExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Lease And Rental Expense </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_AssetTransferAndLicenseAgreementInitialNonrefundableUpfrontPayment" xlink:type="locator" xlink:label="etnb_AssetTransferAndLicenseAgreementInitialNonrefundableUpfrontPayment"/>

<link:label xml:lang="en-US" xlink:label="etnb_AssetTransferAndLicenseAgreementInitialNonrefundableUpfrontPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Asset transfer and license agreements initial nonrefundable upfront payment. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_AssetTransferAndLicenseAgreementInitialNonrefundableUpfrontPayment" xlink:to="etnb_AssetTransferAndLicenseAgreementInitialNonrefundableUpfrontPayment_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_ObligationToPaymentUponMaximumAchievementOfCertainClinicalAndCommercialMilestones" xlink:type="locator" xlink:label="etnb_ObligationToPaymentUponMaximumAchievementOfCertainClinicalAndCommercialMilestones"/>

<link:label xml:lang="en-US" xlink:label="etnb_ObligationToPaymentUponMaximumAchievementOfCertainClinicalAndCommercialMilestones_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Obligation to payment upon maximum achievement of certain clinical and commercial milestones. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_ObligationToPaymentUponMaximumAchievementOfCertainClinicalAndCommercialMilestones" xlink:to="etnb_ObligationToPaymentUponMaximumAchievementOfCertainClinicalAndCommercialMilestones_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_AssetTransferAndLicenseAgreementInitialNonrefundableUpfrontPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Nonrefundable upfront payment </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_AssetTransferAndLicenseAgreementInitialNonrefundableUpfrontPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Asset Transfer And License Agreement Initial Nonrefundable Upfront Payment </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_ObligationToPaymentUponMaximumAchievementOfCertainClinicalAndCommercialMilestones_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Payment upon achievement of certain clinical and commercial milestones </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_ObligationToPaymentUponMaximumAchievementOfCertainClinicalAndCommercialMilestones_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Obligation To Payment Upon Maximum Achievement Of Certain Clinical And Commercial Milestones </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_AssetTransferAndLicenseAgreementTerminationPeriodAfterWrittenNotice" xlink:type="locator" xlink:label="etnb_AssetTransferAndLicenseAgreementTerminationPeriodAfterWrittenNotice"/>

<link:label xml:lang="en-US" xlink:label="etnb_AssetTransferAndLicenseAgreementTerminationPeriodAfterWrittenNotice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Asset transfer and license agreement termination period after written notice. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_AssetTransferAndLicenseAgreementTerminationPeriodAfterWrittenNotice" xlink:to="etnb_AssetTransferAndLicenseAgreementTerminationPeriodAfterWrittenNotice_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_AssetTransferAndLicenseAgreementTerminationPeriodNoticeOfFailure" xlink:type="locator" xlink:label="etnb_AssetTransferAndLicenseAgreementTerminationPeriodNoticeOfFailure"/>

<link:label xml:lang="en-US" xlink:label="etnb_AssetTransferAndLicenseAgreementTerminationPeriodNoticeOfFailure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Asset transfer and license agreement termination period notice of failure. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_AssetTransferAndLicenseAgreementTerminationPeriodNoticeOfFailure" xlink:to="etnb_AssetTransferAndLicenseAgreementTerminationPeriodNoticeOfFailure_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_AssetTransferAndLicenseAgreementTerminationNoticePeriodIfBankruptcyPetitionFiled" xlink:type="locator" xlink:label="etnb_AssetTransferAndLicenseAgreementTerminationNoticePeriodIfBankruptcyPetitionFiled"/>

<link:label xml:lang="en-US" xlink:label="etnb_AssetTransferAndLicenseAgreementTerminationNoticePeriodIfBankruptcyPetitionFiled_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Asset transfer and license agreement termination notice period if bankruptcy petition filed. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_AssetTransferAndLicenseAgreementTerminationNoticePeriodIfBankruptcyPetitionFiled" xlink:to="etnb_AssetTransferAndLicenseAgreementTerminationNoticePeriodIfBankruptcyPetitionFiled_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_AssetTransferAndLicenseAgreementTerminationPeriodAfterWrittenNotice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Asset transfer and license agreement, termination period after written notice </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_AssetTransferAndLicenseAgreementTerminationPeriodAfterWrittenNotice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Asset Transfer And License Agreement Termination Period After Written Notice </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_AssetTransferAndLicenseAgreementTerminationPeriodNoticeOfFailure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Asset transfer and license agreement, termination period notice of breach </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_AssetTransferAndLicenseAgreementTerminationPeriodNoticeOfFailure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Asset Transfer And License Agreement Termination Period Notice Of Failure </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_AssetTransferAndLicenseAgreementTerminationNoticePeriodIfBankruptcyPetitionFiled_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Asset transfer and license agreement termination notice period if bankruptcy petition filed </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_AssetTransferAndLicenseAgreementTerminationNoticePeriodIfBankruptcyPetitionFiled_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Asset Transfer And License Agreement Termination Notice Period If Bankruptcy Petition Filed </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_UpFrontLicensePayment" xlink:type="locator" xlink:label="etnb_UpFrontLicensePayment"/>

<link:label xml:lang="en-US" xlink:label="etnb_UpFrontLicensePayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Upfront license payment. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_UpFrontLicensePayment" xlink:to="etnb_UpFrontLicensePayment_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_UpFrontLicensePayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Up-front license payment </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_UpFrontLicensePayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Up Front License Payment </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentTable"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Debt Instrument [Table] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentTable_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Instrument [Table] </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_LoanAndSecurityAgreementMember" xlink:type="locator" xlink:label="etnb_LoanAndSecurityAgreementMember"/>

<link:label xml:lang="en-US" xlink:label="etnb_LoanAndSecurityAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Loan and security agreement. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_LoanAndSecurityAgreementMember" xlink:to="etnb_LoanAndSecurityAgreementMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_LoanAndSecurityAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Loan And Security Agreement [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentAxis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Debt Instrument </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentAxis_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Instrument [Axis] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentNameDomain"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Debt Instrument, Name </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="us-gaap_DebtInstrumentNameDomain_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_TermALoanFacilityMember" xlink:type="locator" xlink:label="etnb_TermALoanFacilityMember"/>

<link:label xml:lang="en-US" xlink:label="etnb_TermALoanFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Term A loan facility. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_TermALoanFacilityMember" xlink:to="etnb_TermALoanFacilityMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_TermALoanFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Term A Loan Facility </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_TermALoanFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Term A Loan Facility [Member] </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_TermBLoanFacilityMember" xlink:type="locator" xlink:label="etnb_TermBLoanFacilityMember"/>

<link:label xml:lang="en-US" xlink:label="etnb_TermBLoanFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Term b loan facility. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_TermBLoanFacilityMember" xlink:to="etnb_TermBLoanFacilityMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_TermBLoanFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Term B Loan Facility </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_TermBLoanFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Term B Loan Facility [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VariableRateAxis" xlink:type="locator" xlink:label="us-gaap_VariableRateAxis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Variable Rate </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VariableRateAxis" xlink:to="us-gaap_VariableRateAxis_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Variable Rate [Axis] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VariableRateDomain" xlink:type="locator" xlink:label="us-gaap_VariableRateDomain"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Variable Rate </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VariableRateDomain" xlink:to="us-gaap_VariableRateDomain_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Variable Rate [Domain] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PrimeRateMember" xlink:type="locator" xlink:label="us-gaap_PrimeRateMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PrimeRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Prime Rate </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrimeRateMember" xlink:to="us-gaap_PrimeRateMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PrimeRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Prime Rate [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MeasurementInputExpectedDividendPaymentMember" xlink:type="locator" xlink:label="us-gaap_MeasurementInputExpectedDividendPaymentMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputExpectedDividendPaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Dividends </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputExpectedDividendPaymentMember" xlink:to="us-gaap_MeasurementInputExpectedDividendPaymentMember_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentLineItems"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Debt Instrument [Line Items] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentLineItems_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Instrument [Line Items] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Line of credit facility, maximum borrowing capacity </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Line Of Credit Facility Maximum Borrowing Capacity </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateDuringPeriod" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentInterestRateDuringPeriod"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentInterestRateDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Debt instrument, interest rate </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateDuringPeriod" xlink:to="us-gaap_DebtInstrumentInterestRateDuringPeriod_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentInterestRateDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Instrument Interest Rate During Period </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Debt instrument, basis spread on variable rate </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Debt Instrument Basis Spread On Variable Rate1 </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityExpirationDate1" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityExpirationDate1"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityExpirationDate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Credit facility maturity date </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityExpirationDate1" xlink:to="us-gaap_LineOfCreditFacilityExpirationDate1_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityExpirationDate1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Line Of Credit Facility Expiration Date1 </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityDescription" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityDescription"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Line of credit facility, description </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityDescription" xlink:to="us-gaap_LineOfCreditFacilityDescription_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Line Of Credit Facility Description </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCredit" xlink:type="locator" xlink:label="us-gaap_LineOfCredit"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Amount drawn </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCredit" xlink:to="us-gaap_LineOfCredit_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Line Of Credit </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_FairValueOfWarrantsAssumptionsDividends" xlink:type="locator" xlink:label="etnb_FairValueOfWarrantsAssumptionsDividends"/>

<link:label xml:lang="en-US" xlink:label="etnb_FairValueOfWarrantsAssumptionsDividends_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Fair value of warrant assumptions, dividends. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_FairValueOfWarrantsAssumptionsDividends" xlink:to="etnb_FairValueOfWarrantsAssumptionsDividends_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:type="locator" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Warrants to purchase common stock </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:to="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Class Of Warrant Or Right Number Of Securities Called By Warrants Or Rights </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:type="locator" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Warrant exercise price </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:to="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WarrantsAndRightsOutstandingMaturityDate" xlink:type="locator" xlink:label="us-gaap_WarrantsAndRightsOutstandingMaturityDate"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_WarrantsAndRightsOutstandingMaturityDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Warrant expiration date </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantsAndRightsOutstandingMaturityDate" xlink:to="us-gaap_WarrantsAndRightsOutstandingMaturityDate_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_WarrantsAndRightsOutstandingMaturityDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Warrants And Rights Outstanding Maturity Date </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_FairValueOfWarrantsAssumptionsDividends_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Fair value of warrant assumptions, dividends </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_FairValueOfWarrantsAssumptionsDividends_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Fair Value Of Warrants Assumptions Dividends </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredFinanceCostsGross" xlink:type="locator" xlink:label="us-gaap_DeferredFinanceCostsGross"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DeferredFinanceCostsGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Debt issuance costs, gross </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredFinanceCostsGross" xlink:to="us-gaap_DeferredFinanceCostsGross_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DeferredFinanceCostsGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Deferred Finance Costs Gross </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredFinanceCostsNet" xlink:type="locator" xlink:label="us-gaap_DeferredFinanceCostsNet"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Debt issuance costs </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredFinanceCostsNet" xlink:to="us-gaap_DeferredFinanceCostsNet_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Deferred Finance Costs Net </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_PeriodForIncreaseInNumberOfSharesOfCommonStockReservedForIssuance" xlink:type="locator" xlink:label="etnb_PeriodForIncreaseInNumberOfSharesOfCommonStockReservedForIssuance"/>

<link:label xml:lang="en-US" xlink:label="etnb_PeriodForIncreaseInNumberOfSharesOfCommonStockReservedForIssuance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Period for increase in number of shares of common stock reserved for issuance. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_PeriodForIncreaseInNumberOfSharesOfCommonStockReservedForIssuance" xlink:to="etnb_PeriodForIncreaseInNumberOfSharesOfCommonStockReservedForIssuance_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_PercentageOfIncreaseInNumberOfSharesOfCapitalStockIssuedAndOutstanding" xlink:type="locator" xlink:label="etnb_PercentageOfIncreaseInNumberOfSharesOfCapitalStockIssuedAndOutstanding"/>

<link:label xml:lang="en-US" xlink:label="etnb_PercentageOfIncreaseInNumberOfSharesOfCapitalStockIssuedAndOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Percentage of increase in number of shares of capital stock reserved for issuance. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_PercentageOfIncreaseInNumberOfSharesOfCapitalStockIssuedAndOutstanding" xlink:to="etnb_PercentageOfIncreaseInNumberOfSharesOfCapitalStockIssuedAndOutstanding_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_NumberOfSharesIssuableUnderShareBasedPaymentArrangement" xlink:type="locator" xlink:label="etnb_NumberOfSharesIssuableUnderShareBasedPaymentArrangement"/>

<link:label xml:lang="en-US" xlink:label="etnb_NumberOfSharesIssuableUnderShareBasedPaymentArrangement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Number of shares issuable under share-based payment arrangement. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_NumberOfSharesIssuableUnderShareBasedPaymentArrangement" xlink:to="etnb_NumberOfSharesIssuableUnderShareBasedPaymentArrangement_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_StockholdersEquityLineItems" xlink:type="locator" xlink:label="etnb_StockholdersEquityLineItems"/>

<link:label xml:lang="en-US" xlink:label="etnb_StockholdersEquityLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Stockholders Equity. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_StockholdersEquityLineItems" xlink:to="etnb_StockholdersEquityLineItems_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_StockholdersEquityTable" xlink:type="locator" xlink:label="etnb_StockholdersEquityTable"/>

<link:label xml:lang="en-US" xlink:label="etnb_StockholdersEquityTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Stockholders Equity. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_StockholdersEquityTable" xlink:to="etnb_StockholdersEquityTable_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_StockholdersEquityTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stockholders Equity [Table] </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_StockholdersEquityTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stockholders Equity [Table] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameAxis" xlink:type="locator" xlink:label="us-gaap_PlanNameAxis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Plan Name </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameAxis_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Plan Name [Axis] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain" xlink:type="locator" xlink:label="us-gaap_PlanNameDomain"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Plan Name </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameDomain" xlink:to="us-gaap_PlanNameDomain_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Plan Name [Domain] </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_TwoThousandAndNineteenEquityIncentivePlanMember" xlink:type="locator" xlink:label="etnb_TwoThousandAndNineteenEquityIncentivePlanMember"/>

<link:label xml:lang="en-US" xlink:label="etnb_TwoThousandAndNineteenEquityIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> 2019 equity incentive plan. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_TwoThousandAndNineteenEquityIncentivePlanMember" xlink:to="etnb_TwoThousandAndNineteenEquityIncentivePlanMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_TwoThousandAndNineteenEquityIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Two Thousand And Nineteen Equity Incentive Plan [Member] </link:label>

<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Employee Stock Purchase Plan </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancialInstrumentAxis" xlink:type="locator" xlink:label="us-gaap_FinancialInstrumentAxis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Financial Instrument </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_FinancialInstrumentAxis_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Financial Instrument [Axis] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:type="locator" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Financial Instruments </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_SeriesASharePurchaseAgreementMember" xlink:type="locator" xlink:label="etnb_SeriesASharePurchaseAgreementMember"/>

<link:label xml:lang="en-US" xlink:label="etnb_SeriesASharePurchaseAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Series A share purchase agreement. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_SeriesASharePurchaseAgreementMember" xlink:to="etnb_SeriesASharePurchaseAgreementMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_SeriesASharePurchaseAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Series A Share Purchase Agreement </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_SeriesASharePurchaseAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Series A Share Purchase Agreement [Member] </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_SeriesAConvertiblePreferredStockMember" xlink:type="locator" xlink:label="etnb_SeriesAConvertiblePreferredStockMember"/>

<link:label xml:lang="en-US" xlink:label="etnb_SeriesAConvertiblePreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Series A convertible preferred stock. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_SeriesAConvertiblePreferredStockMember" xlink:to="etnb_SeriesAConvertiblePreferredStockMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_SeriesAConvertiblePreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Series A Convertible Preferred Stock </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_SeriesAConvertiblePreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Series A Convertible Preferred Stock [Member] </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_StockholdersEquityLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stockholders' Equity [Line Items] </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_StockholdersEquityLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Stockholders Equity [Line Items] </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_NumberOfSharesIssuableUnderShareBasedPaymentArrangement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Number of common shares issuable under the plan (in shares) </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_NumberOfSharesIssuableUnderShareBasedPaymentArrangement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Number Of Shares Issuable Under Share Based Payment Arrangement </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_PeriodForIncreaseInNumberOfSharesOfCommonStockReservedForIssuance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Period for increase in number of shares of common stock reserved for issuance </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_PeriodForIncreaseInNumberOfSharesOfCommonStockReservedForIssuance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Period For Increase In Number Of Shares Of Common Stock Reserved For Issuance </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_PercentageOfIncreaseInNumberOfSharesOfCapitalStockIssuedAndOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Percentage of increase in number of shares of capital stock issued and outstanding </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_PercentageOfIncreaseInNumberOfSharesOfCapitalStockIssuedAndOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Percentage Of Increase In Number Of Shares Of Capital Stock Issued And Outstanding </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:type="locator" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common stock reserved and available for issuance as future option grants </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:to="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock Capital Shares Reserved For Future Issuance </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Percent of purchase shares of common stock </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Sharebased Compensation Arrangement By Sharebased Payment Award Purchase Price Of Common Stock Percent </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_ShareBasedCompensationArrangementByShareBasedPaymentFirstOfferingPeriod" xlink:type="locator" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentFirstOfferingPeriod"/>

<link:label xml:lang="en-US" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentFirstOfferingPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Share based compensation arrangement by share based payment first offering period. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_ShareBasedCompensationArrangementByShareBasedPaymentFirstOfferingPeriod" xlink:to="etnb_ShareBasedCompensationArrangementByShareBasedPaymentFirstOfferingPeriod_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_ShareBasedCompensationArrangementByShareBasedPaymentFirstOfferingPeriodCommencementDate" xlink:type="locator" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentFirstOfferingPeriodCommencementDate"/>

<link:label xml:lang="en-US" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentFirstOfferingPeriodCommencementDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Share based compensation arrangement by share based payment first offering period commencement date. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_ShareBasedCompensationArrangementByShareBasedPaymentFirstOfferingPeriodCommencementDate" xlink:to="etnb_ShareBasedCompensationArrangementByShareBasedPaymentFirstOfferingPeriodCommencementDate_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_ShareBasedCompensationArrangementByShareBasedPaymentSecondOfferingPeriodCommencementDate" xlink:type="locator" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentSecondOfferingPeriodCommencementDate"/>

<link:label xml:lang="en-US" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentSecondOfferingPeriodCommencementDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Share based compensation arrangement by share based payment second offering period commencement date. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_ShareBasedCompensationArrangementByShareBasedPaymentSecondOfferingPeriodCommencementDate" xlink:to="etnb_ShareBasedCompensationArrangementByShareBasedPaymentSecondOfferingPeriodCommencementDate_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_ShareBasedCompensationArrangementByShareBasedPaymentSecondOfferingPeriod" xlink:type="locator" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentSecondOfferingPeriod"/>

<link:label xml:lang="en-US" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentSecondOfferingPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Share based compensation arrangement by share based payment second offering period. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_ShareBasedCompensationArrangementByShareBasedPaymentSecondOfferingPeriod" xlink:to="etnb_ShareBasedCompensationArrangementByShareBasedPaymentSecondOfferingPeriod_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentSecondOfferingPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Second offering period </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentSecondOfferingPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Second Offering Period </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentSecondOfferingPeriodCommencementDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Commencement date of second six month offering period </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentSecondOfferingPeriodCommencementDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Second Offering Period Commencement Date </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentFirstOfferingPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment First Offering Period </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesIssued"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Common stock issued </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesIssued" xlink:to="us-gaap_CommonStockSharesIssued_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Common Stock Shares Issued </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentFirstOfferingPeriodCommencementDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Commencement date of first six month offering period </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentFirstOfferingPeriodCommencementDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment First Offering Period Commencement Date </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Number of shares of common stock available for issuance under ESPP </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable" xlink:to="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] </link:label>

<link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Research and Development </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GeneralAndAdministrativeExpenseMember" xlink:type="locator" xlink:label="us-gaap_GeneralAndAdministrativeExpenseMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_GeneralAndAdministrativeExpenseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> General and Administrative </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GeneralAndAdministrativeExpenseMember" xlink:to="us-gaap_GeneralAndAdministrativeExpenseMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_GeneralAndAdministrativeExpenseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> General And Administrative Expense [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems" xlink:type="locator" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:type="locator" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Share-based compensation </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllocatedShareBasedCompensationExpense" xlink:to="us-gaap_AllocatedShareBasedCompensationExpense_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Allocated Share Based Compensation Expense </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis" xlink:type="locator" xlink:label="us-gaap_AwardTypeAxis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AwardTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Award Type </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_AwardTypeAxis_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AwardTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Award Type [Axis] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Award Type </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:type="locator" xlink:label="us-gaap_EmployeeStockOptionMember"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeStockOptionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Stock Options </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeStockOptionMember" xlink:to="us-gaap_EmployeeStockOptionMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeStockOptionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Employee Stock Option [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Share Based Compensation Arrangement By Share Based Payment Award [Line Items] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award [Line Items] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Expected term (years) </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Expected volatility </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Risk-free interest rate, minimum </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Minimum </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Risk-free interest rate, maximum </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Maximum </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Expected dividend </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Number of Options </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Outstanding, Beginning Balance </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Granted </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl"/>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel"> Cancelled </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Outstanding, Ending Balance </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Exercisable as of September 30, 2020 </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Weighted Average Exercise Price </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Rollforward </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"> Weighted Average Exercise Price Outstanding, Beginning Balance </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Weighted Average Exercise Price, Granted </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Weighted Average Exercise Price, Exercised </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Weighted Average Exercise Price, Cancelled </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price </link:label>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"> Weighted Average Exercise Price Outstanding, Ending Balance </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Weighted Average Exercise Price, Exercisable as of September 30, 2020 </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" xlink:type="locator" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract"/>

<link:label xml:lang="en-US" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Share based compensation arrangement by share based payment award options weighted average remaining contractual term. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" xlink:to="etnb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Weighted Average Remaining Contractual Term (In years) </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Weighted Average Remaining Contractual Term [Abstract] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Weighted Average Remaining Contractual Term (In years), Outstanding </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Weighted Average Remaining Contractual Term (In years), Exercisable as of September 30, 2020 </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" xlink:type="locator" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract"/>

<link:label xml:lang="en-US" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Share based compensation arrangement by share based payment award options aggregate intrinsic value. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" xlink:to="etnb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Aggregate Intrinsic Value </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Aggregate Intrinsic Value [Abstract] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Aggregate Intrinsic Value Outstanding </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Aggregate Intrinsic Value, Exercisable as of September 30, 2020 </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_AmountOfPreferredSharesIssuableByEntity" xlink:type="locator" xlink:label="etnb_AmountOfPreferredSharesIssuableByEntity"/>

<link:label xml:lang="en-US" xlink:label="etnb_AmountOfPreferredSharesIssuableByEntity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Total amount of preferred shares issuable by the entity. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_AmountOfPreferredSharesIssuableByEntity" xlink:to="etnb_AmountOfPreferredSharesIssuableByEntity_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_NumberOfSharesCommittedToPurchaseNoLongerIssuable" xlink:type="locator" xlink:label="etnb_NumberOfSharesCommittedToPurchaseNoLongerIssuable"/>

<link:label xml:lang="en-US" xlink:label="etnb_NumberOfSharesCommittedToPurchaseNoLongerIssuable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Number of shares committed to purchase, no longer issuable. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_NumberOfSharesCommittedToPurchaseNoLongerIssuable" xlink:to="etnb_NumberOfSharesCommittedToPurchaseNoLongerIssuable_lbl"/>

<link:loc xlink:href="etnb-20200930.xsd#etnb_CapitalContributionRelatedToExtinguishmentOfPreferredStockLiability" xlink:type="locator" xlink:label="etnb_CapitalContributionRelatedToExtinguishmentOfPreferredStockLiability"/>

<link:label xml:lang="en-US" xlink:label="etnb_CapitalContributionRelatedToExtinguishmentOfPreferredStockLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Capital contribution related to extinguishment of preferred stock liability. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_CapitalContributionRelatedToExtinguishmentOfPreferredStockLiability" xlink:to="etnb_CapitalContributionRelatedToExtinguishmentOfPreferredStockLiability_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_AmountOfPreferredSharesIssuableByEntity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Total amount of preferred shares issuable by the entity </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_AmountOfPreferredSharesIssuableByEntity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Amount Of Preferred Shares Issuable By Entity </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TemporaryEquityParOrStatedValuePerShare" xlink:type="locator" xlink:label="us-gaap_TemporaryEquityParOrStatedValuePerShare"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_TemporaryEquityParOrStatedValuePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Per share price of issuance of shares </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TemporaryEquityParOrStatedValuePerShare" xlink:to="us-gaap_TemporaryEquityParOrStatedValuePerShare_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_TemporaryEquityParOrStatedValuePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Temporary Equity Par Or Stated Value Per Share </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_NumberOfSharesCommittedToPurchaseNoLongerIssuable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Number of shares committed to purchase, no longer issuable </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_NumberOfSharesCommittedToPurchaseNoLongerIssuable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Number Of Shares Committed To Purchase No Longer Issuable </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_CapitalContributionRelatedToExtinguishmentOfPreferredStockLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Capital contribution related to extinguishment of preferred stock liability </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_CapitalContributionRelatedToExtinguishmentOfPreferredStockLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Capital Contribution Related To Extinguishment Of Preferred Stock Liability </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:to="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:type="locator" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Antidilutive Securities </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:type="locator" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Antidilutive Securities, Name </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AntidilutiveSecuritiesNameDomain" xlink:to="us-gaap_AntidilutiveSecuritiesNameDomain_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Antidilutive Securities Name [Domain] </link:label>

<link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeStockOptionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel"> Stock Options to Purchase Common Stock </link:label>

<link:loc xlink:href="etnb-20200930.xsd#etnb_ConvertiblePreferredStockAsConvertedMember" xlink:type="locator" xlink:label="etnb_ConvertiblePreferredStockAsConvertedMember"/>

<link:label xml:lang="en-US" xlink:label="etnb_ConvertiblePreferredStockAsConvertedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation"> Convertible preferred stock, as converted. </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="etnb_ConvertiblePreferredStockAsConvertedMember" xlink:to="etnb_ConvertiblePreferredStockAsConvertedMember_lbl"/>

<link:label xml:lang="en-US" xlink:label="etnb_ConvertiblePreferredStockAsConvertedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Convertible Preferred Stock, as Converted </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_ConvertiblePreferredStockAsConvertedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Convertible Preferred Stock As Converted [Member] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:type="locator" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:type="locator" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Antidilutive common stock equivalents excluded from calculation of diluted net loss per share </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Schedule Of Related Party Transactions By Related Party [Table] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Schedule Of Related Party Transactions By Related Party [Table] </link:label>

<link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel"> Related Party Transaction [Line Items] </link:label>

<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_RelatedPartyTransactionLineItems_lbl"/>

<link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label"> Related Party Transaction [Line Items] </link:label>

<link:label xml:lang="en-US" xlink:label="etnb_CapitalContributionRelatedToExtinguishmentOfPreferredStockLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel"> Capital contribution </link:label>

</link:labelLink>

</link:linkbase>

3 Subsequent Filings that Reference this Filing

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 3/15/23  89bio, Inc.                       10-K       12/31/22   68:14M                                    Donnelley … Solutions/FA
 3/24/22  89bio, Inc.                       10-K       12/31/21   62:12M                                    ActiveDisclosure/FA
 3/25/21  89bio, Inc.                       10-K       12/31/20   65:8.8M                                   ActiveDisclosure/FA

4 Previous Filings that this Filing References

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 4/13/20  89bio, Inc.                       8-K:1,2,3,9 4/07/20    3:457K                                   Donnelley … Solutions/FA
11/15/19  89bio, Inc.                       8-K:5,9    11/13/19    3:162K                                   Donnelley … Solutions/FA
10/28/19  89bio, Inc.                       S-1/A                 12:6.6M                                   Donnelley … Solutions/FA
10/11/19  89bio, Inc.                       S-1                   19:6.5M                                   Donnelley … Solutions/FA

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Filing Submission 0001564590-20-053677 – Alternative Formats (Word / Rich Text, HTML, Plain Text, et al.)