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  <xs:element id="aztr_YearTwoThousandNineteenMember" abstract="false" name="YearTwoThousandNineteenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_YearTwoThousandTwentyThreeMember" abstract="false" name="YearTwoThousandTwentyThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2024AwardOneMember" abstract="true" name="Year2024AwardOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2024AwardTwoMember" abstract="true" name="Year2024AwardTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2024AwardThreeMember" abstract="true" name="Year2024AwardThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardOneMember" abstract="true" name="Year2025AwardOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardTwoMember" abstract="true" name="Year2025AwardTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardFourMember" abstract="true" name="Year2025AwardFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardFiveMember" abstract="true" name="Year2025AwardFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardSixMember" abstract="true" name="Year2025AwardSixMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardSevenMember" abstract="true" name="Year2025AwardSevenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardEightMember" abstract="true" name="Year2025AwardEightMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardNineMember" abstract="true" name="Year2025AwardNineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardTenMember" abstract="true" name="Year2025AwardTenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardElevenMember" abstract="true" name="Year2025AwardElevenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardTwelveMember" abstract="true" name="Year2025AwardTwelveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardThirteenMember" abstract="true" name="Year2025AwardThirteenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardFourteenMember" abstract="true" name="Year2025AwardFourteenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardFifteenMember" abstract="true" name="Year2025AwardFifteenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardSixteenMember" abstract="true" name="Year2025AwardSixteenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardSeventeenMember" abstract="true" name="Year2025AwardSeventeenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardEighteenMember" abstract="true" name="Year2025AwardEighteenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardNineteenMember" abstract="true" name="Year2025AwardNineteenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardTwentyMember" abstract="true" name="Year2025AwardTwentyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardTwentyOneMember" abstract="true" name="Year2025AwardTwentyOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardTwentyTwoMember" abstract="true" name="Year2025AwardTwentyTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardTwentyThreeMember" abstract="true" name="Year2025AwardTwentyThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardTwentyFourMember" abstract="true" name="Year2025AwardTwentyFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardTwentyFiveMember" abstract="true" name="Year2025AwardTwentyFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardTwentySixMember" abstract="true" name="Year2025AwardTwentySixMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_Year2025AwardTwentySevenMember" abstract="true" name="Year2025AwardTwentySevenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_ClassOfWarrantOrRightWarrantsOutstandingWeightedAverageRemainingContractualLife" abstract="false" name="ClassOfWarrantOrRightWarrantsOutstandingWeightedAverageRemainingContractualLife" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="aztr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingPeriodIncreaseDecreaseWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingPeriodIncreaseDecreaseWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="aztr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsExercisableNumber" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsExercisableNumber" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="aztr_SharebasedCompensationArrangementBySharebasedPaymentAwardNonOptionsExercisableWeightedAverageRemainingContractualTerm1" abstract="false" name="SharebasedCompensationArrangementBySharebasedPaymentAwardNonOptionsExercisableWeightedAverageRemainingContractualTerm1" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="aztr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsExercisableWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsExercisableWeightedAverageExercisePrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="aztr_TwoThousandTwentyThreeStockIncentivePlanMember" abstract="false" name="TwoThousandTwentyThreeStockIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_TwoThousandSixteenStockIncentivePlanMember" abstract="false" name="TwoThousandSixteenStockIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="aztr_ShareBasedCompensationArrangementByShareBasedPaymentAwardAutomaticAnnualIncreaseToSharesAvailableForIssuancePercentageOfStock" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAutomaticAnnualIncreaseToSharesAvailableForIssuancePercentageOfStock" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="aztr_ShareBasedCompensationArrangementByShareBasedPaymentAwardAutomaticAnnualIncreaseToSharesAvailableForIssuanceTerm" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAutomaticAnnualIncreaseToSharesAvailableForIssuanceTerm" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="aztr_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsUnderlyingCommonStockValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsUnderlyingCommonStockValue" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="aztr_ExercisePrice0.29Member" abstract="true" name="ExercisePrice0.29Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_ExercisePrice95.38Member" abstract="true" name="ExercisePrice95.38Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_ExercisePrice185.15Member" abstract="true" name="ExercisePrice185.15Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_ExercisePrice340.20Member" abstract="true" name="ExercisePrice340.20Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_ExercisePrice413.59Member" abstract="true" name="ExercisePrice413.59Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_WarrantLiabilityFairValueDisclosure" abstract="false" name="WarrantLiabilityFairValueDisclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aztr_WarrantLiabilityMember" abstract="true" name="WarrantLiabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_EffectiveIncomeTaxRateReconciliationWarrantFairValueAdjustmentAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationWarrantFairValueAdjustmentAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aztr_EffectiveIncomeTaxRateReconciliationIssuanceOfCommonStockAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationIssuanceOfCommonStockAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aztr_EffectiveIncomeTaxRateReconciliationWarrantFairValueAdjustmentPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationWarrantFairValueAdjustmentPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="aztr_EffectiveIncomeTaxRateReconciliationIssuanceOfCommonStockPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationIssuanceOfCommonStockPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="aztr_DeferredTaxAssetsDepreciationAndAmortization" abstract="false" name="DeferredTaxAssetsDepreciationAndAmortization" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aztr_TaxYears2036Through2037Member" abstract="true" name="TaxYears2036Through2037Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_NoExpirationMember" abstract="true" name="NoExpirationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_TaxYears2037Through2043Member" abstract="true" name="TaxYears2037Through2043Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_TaxYears2039Through2043Member" abstract="true" name="TaxYears2039Through2043Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_TaxYears2036Through2038Member" abstract="true" name="TaxYears2036Through2038Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_MontrealQuebecMember" abstract="true" name="MontrealQuebecMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_BranfordCTMember" abstract="false" name="BranfordCTMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_GrotonCTMember" abstract="false" name="GrotonCTMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aztr_LicenseAgreementTerm" abstract="false" name="LicenseAgreementTerm" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="aztr_LicenseAgreementLengthOfWrittenNoticeRequiredForTermination" abstract="false" name="LicenseAgreementLengthOfWrittenNoticeRequiredForTermination" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="aztr_OperatingLeasePaymentsPercentageIncreasePerYear" abstract="false" name="OperatingLeasePaymentsPercentageIncreasePerYear" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="aztr_FinanceLeaseMonthlyPayments" abstract="false" name="FinanceLeaseMonthlyPayments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aztr_FinanceLeaseExpense" abstract="false" name="FinanceLeaseExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aztr_DefinedContributionPlanMonthsOfServiceRequired" abstract="false" name="DefinedContributionPlanMonthsOfServiceRequired" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="aztr_DefinedContributionPlanMinimumWorkHours" abstract="false" name="DefinedContributionPlanMinimumWorkHours" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="aztr_DefinedContributionPlanMinimumWorkHoursInFirstYearOfService" abstract="false" name="DefinedContributionPlanMinimumWorkHoursInFirstYearOfService" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="aztr_DefinedContributionPlanAdditionalEmployerMatchingContributionPercentOfMatch" abstract="false" name="DefinedContributionPlanAdditionalEmployerMatchingContributionPercentOfMatch" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="aztr_DefinedContributionPlanAdditionalEmployerMatchingContributionAdditionalPercentOfEmployeesGrossPay" abstract="false" name="DefinedContributionPlanAdditionalEmployerMatchingContributionAdditionalPercentOfEmployeesGrossPay" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="aztr_FixedAssetsOriginalCostBasis" abstract="false" name="FixedAssetsOriginalCostBasis" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
