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  <xs:element id="bhvn_ChangeInRestrictedCashHeldOnBehalfOfFormerParentFinancingActivities" abstract="false" name="ChangeInRestrictedCashHeldOnBehalfOfFormerParentFinancingActivities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bhvn_NetTransfersFromParent" abstract="false" name="NetTransfersFromParent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bhvn_CostAllocationsMember" abstract="true" name="CostAllocationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="bhvn_CollaborativeArrangementPercentageOfFundsRaisedForProgram" abstract="false" name="CollaborativeArrangementPercentageOfFundsRaisedForProgram" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="bhvn_NetInvestmentFromFormerParentMember" abstract="true" name="NetInvestmentFromFormerParentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="bhvn_MilestonePaymentToBePaidByCompanyUponSpecifiedRegulatoryAndCommercialMilestoneAchievementSecondIndication" abstract="false" name="MilestonePaymentToBePaidByCompanyUponSpecifiedRegulatoryAndCommercialMilestoneAchievementSecondIndication" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bhvn_ModaPharmaceuticalsLLCMember" abstract="true" name="ModaPharmaceuticalsLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="bhvn_IssuanceOfFormerParentCommonSharesAsPaymentForIPRDAssetAcquisitionMember" abstract="true" name="IssuanceOfFormerParentCommonSharesAsPaymentForIPRDAssetAcquisitionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="bhvn_PreferredStockPurchaseAgreementSharesReceivedShares" abstract="false" name="PreferredStockPurchaseAgreementSharesReceivedShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="bhvn_MilestonePaymentToBePaidByCompanyUponSpecifiedSalesBasedMilestoneAchievement" abstract="false" name="MilestonePaymentToBePaidByCompanyUponSpecifiedSalesBasedMilestoneAchievement" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bhvn_RoyaltyPaymentToBePaidByCompanyUponSpecifiedApprovedProductsByNetSalesPercentage" abstract="false" name="RoyaltyPaymentToBePaidByCompanyUponSpecifiedApprovedProductsByNetSalesPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="bhvn_MilestonePaymentToBePaidByCompanyUponSpecifiedDevelopmentMilestoneAchievementPerAdditionalNDAFiling" abstract="false" name="MilestonePaymentToBePaidByCompanyUponSpecifiedDevelopmentMilestoneAchievementPerAdditionalNDAFiling" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bhvn_MarketableSecuritiesCurrentMember" abstract="true" name="MarketableSecuritiesCurrentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="bhvn_OtherSeparationRelatedAdjustmentsMember" abstract="true" name="OtherSeparationRelatedAdjustmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
</xs:schema>
