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    <element id="OGEN_StockIssuedDuringPeriodValueReverseStockSplits" name="StockIssuedDuringPeriodValueReverseStockSplits" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="OGEN_StockIssuedDuringPeriodValueOfCancellationOfPreferredStock" name="StockIssuedDuringPeriodValueOfCancellationOfPreferredStock" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="OGEN_StockIssuedDuringPeriodSharesOfCancellationOfPreferredStock" name="StockIssuedDuringPeriodSharesOfCancellationOfPreferredStock" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="OGEN_StockbasedCompensationRecaptureExpense" name="StockbasedCompensationRecaptureExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="OGEN_CommonStockForServicesRendered" name="CommonStockForServicesRendered" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="OGEN_IncreaseDecreaseInInterestReceivable" name="IncreaseDecreaseInInterestReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="OGEN_DisclosurePrepaidExpensesAndOtherCurrentAssetsAbstract" name="DisclosurePrepaidExpensesAndOtherCurrentAssetsAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="OGEN_PrepaidExpenseAndOtherAssetsCurrentTextBlock" name="PrepaidExpenseAndOtherAssetsCurrentTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="OGEN_DisclosureWarrantsAbstract" name="DisclosureWarrantsAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="OGEN_WarrantsDisclosureTextBlock" name="WarrantsDisclosureTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="OGEN_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisable" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisable" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="OGEN_WarrantAbstract" name="WarrantAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="OGEN_WarrantsTable" name="WarrantsTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
    <element id="OGEN_WarrantsAbstract" name="WarrantsAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="OGEN_PercentageOfAgentCommission" name="PercentageOfAgentCommission" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="OGEN_IncreaseDecreaseInPublicFloat" name="IncreaseDecreaseInPublicFloat" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="OGEN_IncreaseDecreaseInInterestIncome" name="IncreaseDecreaseInInterestIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
</schema>
