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  <xs:element id="uncy_SeriesA3ConvertiblePreferredStockMember" name="SeriesA3ConvertiblePreferredStockMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_SeriesA5ConvertiblePreferredStockMember" name="SeriesA5ConvertiblePreferredStockMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_ShareholderMember" name="ShareholderMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
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  <xs:element id="uncy_TrancheCWarrantMember" name="TrancheCWarrantMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_SeriesBCertificateOfDesignationMember" name="SeriesBCertificateOfDesignationMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_ProceedFromIssuanceOfPreferredStock" name="ProceedFromIssuanceOfPreferredStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="uncy_AnnualRatePercentage" name="AnnualRatePercentage" type="dtr:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="uncy_IssuanceofSeriesA1PreferredStockDetailsTable" name="IssuanceofSeriesA1PreferredStockDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
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  <xs:element id="uncy_SeriesA2PrimeConvertiblePreferredStockMember" name="SeriesA2PrimeConvertiblePreferredStockMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_IssuanceofSeriesB1PreferredStockandSeriesB2PreferredStockDetailsTable" name="IssuanceofSeriesB1PreferredStockandSeriesB2PreferredStockDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
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  <xs:element id="uncy_SecuritiesPurchaseAgreementMember" name="SecuritiesPurchaseAgreementMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_OriginalTrancheCWarrantsMember" name="OriginalTrancheCWarrantsMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms2" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms2" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="uncy_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageExercisePriceWarrantsExercised" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageExercisePriceWarrantsExercised" type="dtr:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="uncy_StockBasedCompensationScheduleofActivityforStockOptionsDetailsTable" name="StockBasedCompensationScheduleofActivityforStockOptionsDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerminYearsOptionsForfeited" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerminYearsOptionsForfeited" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
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  <xs:element id="uncy_ShareholdersMember" name="ShareholdersMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageExercisePriceWarrantsIssued" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageExercisePriceWarrantsIssued" type="dtr:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="uncy_MeasurementInputProbabilityForFDAApprovalMember" name="MeasurementInputProbabilityForFDAApprovalMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_ResearchAndDevelopmentMember" name="ResearchAndDevelopmentMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_StockBasedCompensationScheduleofFairValueofAwardsGrantedDetailsTable" name="StockBasedCompensationScheduleofFairValueofAwardsGrantedDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_ScheduleOfValuationInputsIntoTheBlackScholesModelForTheLiabilityAbstract" name="ScheduleOfValuationInputsIntoTheBlackScholesModelForTheLiabilityAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedIntrinsicValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedIntrinsicValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="uncy_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueOptionsForfeited" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueOptionsForfeited" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="uncy_ScheduleOfStockBasedCompensationExpenseAbstract" name="ScheduleOfStockBasedCompensationExpenseAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_StatementOfIncomeAxis" name="StatementOfIncomeAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfSharesUnderlyingOutstandingWarrantsIssued" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfSharesUnderlyingOutstandingWarrantsIssued" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
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  <xs:element id="uncy_ExercisedStockOption" name="ExercisedStockOption" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="uncy_AltairNanomaterialsIncMember" name="AltairNanomaterialsIncMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_MaturitiesOfMarketableSecurities" name="MaturitiesOfMarketableSecurities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="uncy_AltairMember" name="AltairMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_LotusInternationalPteLtdMember" name="LotusInternationalPteLtdMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_AgreementDuePayments" name="AgreementDuePayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="uncy_ExclusiveLicenseAgreementMember" name="ExclusiveLicenseAgreementMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_PrepaidExpensesPolicyTextBlock" name="PrepaidExpensesPolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="uncy_CashCashEquivalentsandMarketableSecuritiesScheduleofCompanysInvestmentsDetailsTable" name="CashCashEquivalentsandMarketableSecuritiesScheduleofCompanysInvestmentsDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_IncreaseDecreaseInDiscountOnInvestmentsInMarketableSecurities" name="IncreaseDecreaseInDiscountOnInvestmentsInMarketableSecurities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="uncy_ScheduleOfChangesInFairValueOfTheWarrantLiabilityClassifiedInLevel3Abstract" name="ScheduleOfChangesInFairValueOfTheWarrantLiabilityClassifiedInLevel3Abstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_LeesPharmaceuticalHKLimitedMember" name="LeesPharmaceuticalHKLimitedMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_InvestmentMember" name="InvestmentMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_OrganizationandDescriptionofBusinessDetailsTable" name="OrganizationandDescriptionofBusinessDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_GuggenheimSecuritiesLLCMember" name="GuggenheimSecuritiesLLCMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_SpectrumAgreementMember" name="SpectrumAgreementMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_RoyaltyPercentage" name="RoyaltyPercentage" type="dtr:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="uncy_PaymentAmount" name="PaymentAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="uncy_SubLicenseIncomeGrantedPercentage" name="SubLicenseIncomeGrantedPercentage" type="dtr:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="uncy_SignificantPaymentReceived" name="SignificantPaymentReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="uncy_OperatingLeaseMember" name="OperatingLeaseMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_LeaseLiabilityMember" name="LeaseLiabilityMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_ScheduleOfPropertyAndEquipmentAbstract" name="ScheduleOfPropertyAndEquipmentAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_SublicenseDevelopmentAgreementMember" name="SublicenseDevelopmentAgreementMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_ShilpaMedicareLtdMember" name="ShilpaMedicareLtdMember" type="dtr:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_SecondClinicalTrialPayment" name="SecondClinicalTrialPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="uncy_RoyaltiesPercentage" name="RoyaltiesPercentage" type="dtr:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="uncy_OperatingLeaseDetailsTable" name="OperatingLeaseDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="uncy_SublicenseIncomePercentage" name="SublicenseIncomePercentage" type="dtr:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="uncy_MilestonePayments" name="MilestonePayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
</xs:schema>
