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  <import namespace="http://xbrl.sec.gov/invest/2013-01-31" schemaLocation="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd"/>
  <import namespace="http://xbrl.sec.gov/stpr/2011-01-31" schemaLocation="http://xbrl.sec.gov/stpr/2011/stpr-2011-01-31.xsd"/>
  <element name="AmendedAgreementMember" id="cnce_AmendedAgreementMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="AnnualBaseRentFutureMinimumPaymentsYearFour" id="cnce_AnnualBaseRentFutureMinimumPaymentsYearFour" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="AnnualBaseRentFutureMinimumPaymentsYearOne" id="cnce_AnnualBaseRentFutureMinimumPaymentsYearOne" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="AnnualBaseRentFutureMinimumPaymentsYearThree" id="cnce_AnnualBaseRentFutureMinimumPaymentsYearThree" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="AnnualBaseRentFutureMinimumPaymentsYearTwo" id="cnce_AnnualBaseRentFutureMinimumPaymentsYearTwo" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="AreaOfLeasedOfficeAndLaboratorySpace" id="cnce_AreaOfLeasedOfficeAndLaboratorySpace" type="num:areaItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestment" id="cnce_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="AvailableForSaleSecuritiesGrossUnrealizedLossesAccumulatedInInvestment" id="cnce_AvailableForSaleSecuritiesGrossUnrealizedLossesAccumulatedInInvestment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="AvanirPharmaceuticalsMember" id="cnce_AvanirPharmaceuticalsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CelgeneMember" id="cnce_CelgeneMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DeferredRevenueRecognitionPeriod" id="cnce_DeferredRevenueRecognitionPeriod" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DevelopmentBasedMilestonesMember" id="cnce_DevelopmentBasedMilestonesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DevelopmentServicesMember" id="cnce_DevelopmentServicesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DocumentAndEntityInformationAbstract" id="cnce_DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ExpansionOfOfficeAndLaboratorySpace" id="cnce_ExpansionOfOfficeAndLaboratorySpace" type="num:areaItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="FirstDiscountDeliverableMember" id="cnce_FirstDiscountDeliverableMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="FirstTrancheMember" id="cnce_FirstTrancheMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="GskMember" id="cnce_GskMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="InitialProgramMember" id="cnce_InitialProgramMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="JazzPharmaceuticalsMember" id="cnce_JazzPharmaceuticalsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="JointSteeringCommitteeDeliverableMember" id="cnce_JointSteeringCommitteeDeliverableMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LeaseBeginningDate" id="cnce_LeaseBeginningDate" type="us-types:dateStringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LeaseBeginningDateOnAdditionalSpace" id="cnce_LeaseBeginningDateOnAdditionalSpace" type="xbrli:dateItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LeaseExpiryDateOnAdditionalSpace" id="cnce_LeaseExpiryDateOnAdditionalSpace" type="xbrli:dateItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LeaseExtensionPeriods" id="cnce_LeaseExtensionPeriods" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LicenseAgreementExpiryPeriod" id="cnce_LicenseAgreementExpiryPeriod" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LicenseDeliverableMember" id="cnce_LicenseDeliverableMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LicensedMember" id="cnce_LicensedMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LicenseExerciseFeeMember" id="cnce_LicenseExerciseFeeMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="MilestoneScenarioOneMember" id="cnce_MilestoneScenarioOneMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="MilestoneScenarioTwoMember" id="cnce_MilestoneScenarioTwoMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NatureOfBusinessLineItems" id="cnce_NatureOfBusinessLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NatureOfBusinessTable" id="cnce_NatureOfBusinessTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="NumberOfAdditionalLicenseProgramsGranted" id="cnce_NumberOfAdditionalLicenseProgramsGranted" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NumberOfEqualMonthlyInstallments" id="cnce_NumberOfEqualMonthlyInstallments" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NumberOfOptionsChoiceProgramsOffered" id="cnce_NumberOfOptionsChoiceProgramsOffered" type="xbrli:positiveIntegerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NumberOfTranches" id="cnce_NumberOfTranches" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OneTwentyEightSpringStreetLexingtonLimitedLiabilityCompanyMember" id="cnce_OneTwentyEightSpringStreetLexingtonLimitedLiabilityCompanyMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OtherAdditionalLicenseProgramMember" id="cnce_OtherAdditionalLicenseProgramMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OutstandingLeaseholdImprovementLoan" id="cnce_OutstandingLeaseholdImprovementLoan" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PatentSupportDeliverableMember" id="cnce_PatentSupportDeliverableMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PercentageOfRoyaltyOnNetSales" id="cnce_PercentageOfRoyaltyOnNetSales" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PhaseOneClinicalTrialMember" id="cnce_PhaseOneClinicalTrialMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PhaseTwoOrThreeClinicalTrialMember" id="cnce_PhaseTwoOrThreeClinicalTrialMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="RegulatoryMilestonesMember" id="cnce_RegulatoryMilestonesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ReimbursementsOfTravelAndIntellectualPropertyExpensesMember" id="cnce_ReimbursementsOfTravelAndIntellectualPropertyExpensesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ResearchAndDevelopmentServicesDeliverableMember" id="cnce_ResearchAndDevelopmentServicesDeliverableMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="RoyaltyTerm" id="cnce_RoyaltyTerm" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SalesBasedMilestonesMember" id="cnce_SalesBasedMilestonesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SecondDiscountDeliverableMember" id="cnce_SecondDiscountDeliverableMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SecondTrancheMember" id="cnce_SecondTrancheMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SeriesCPreferredStockWarrantsMember" id="cnce_SeriesCPreferredStockWarrantsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAggregateIntrinsicValueAbstract" id="cnce_ShareBasedCompensationArrangementByShareBasedPaymentAwardAggregateIntrinsicValueAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfEstimatedForfeitureRateUsedInDeterminingAmountOfStockBasedCompensation" id="cnce_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfEstimatedForfeitureRateUsedInDeterminingAmountOfStockBasedCompensation" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SupplyDeliverableMember" id="cnce_SupplyDeliverableMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="UseOfEstimatesAndSummaryOfSignificantAccountingPoliciesPolicyTextBlock" id="cnce_UseOfEstimatesAndSummaryOfSignificantAccountingPoliciesPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
</schema>


