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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_MarketRiskMember" xml:lang="en-US">Market Risk [Member]</link:label>
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_AssetAllocationRiskMember" xml:lang="en-US">Asset Allocation Risk [Member]</link:label>
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_ManagementRiskMember" xml:lang="en-US">Management Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_ManagementRiskMember" xlink:to="lab_cik0001160990_ManagementRiskMember" />
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          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_IssuerRiskMember" xlink:to="lab_cik0001160990_IssuerRiskMember" />
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          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_CreditRisksMember" xlink:to="lab_cik0001160990_CreditRisksMember" />
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          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_MortgageRelatedDerivativeInstrumentsRiskMember" xlink:label="loc_cik0001160990_MortgageRelatedDerivativeInstrumentsRiskMember" />
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          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_PrivatelyIssuedMortgageRelatedSecuritiesRiskMember" xlink:to="lab_cik0001160990_PrivatelyIssuedMortgageRelatedSecuritiesRiskMember" />
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          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_HighYieldSecuritiesRiskMember" xlink:to="lab_cik0001160990_HighYieldSecuritiesRiskMember" />
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          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_MunicipalBondRiskMember" xlink:to="lab_cik0001160990_MunicipalBondRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_DistressedAndDefaultedSecuritiesRiskMember" xml:lang="en-US">Distressed and Defaulted Securities Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_DistressedAndDefaultedSecuritiesRiskMember" xlink:to="lab_cik0001160990_DistressedAndDefaultedSecuritiesRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_InflationIndexedSecurityRiskMember" xlink:label="loc_cik0001160990_InflationIndexedSecurityRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_InflationIndexedSecurityRiskMember" xml:lang="en-US">Inflation Indexed Security Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_InflationIndexedSecurityRiskMember" xlink:to="lab_cik0001160990_InflationIndexedSecurityRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_DebtSecuritiesRiskMember" xml:lang="en-US">Debt Securities Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_DebtSecuritiesRiskMember" xlink:to="lab_cik0001160990_DebtSecuritiesRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_SeniorDebtRiskMember" xml:lang="en-US">Senior Debt Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_SeniorDebtRiskMember" xlink:to="lab_cik0001160990_SeniorDebtRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_ZeroCouponBondsStepUpsandPaymentInKindSecuritiesRiskMember" xml:lang="en-US">Zero Coupon Bonds Step Ups and Payment In Kind Securities Risk [Member]</link:label>
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          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_LoansAndOtherIndebtednessLoanAcquisitionsParticipationsAndAssignmentsRiskMember" xlink:label="loc_cik0001160990_LoansAndOtherIndebtednessLoanAcquisitionsParticipationsAndAssignmentsRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_LoansAndOtherIndebtednessLoanAcquisitionsParticipationsAndAssignmentsRiskMember" xml:lang="en-US">Loans and Other Indebtedness Loan Acquisitions, Participations and Assignments Risk [Member]</link:label>
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          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_CovenantLiteObligationsRiskMember" xlink:label="loc_cik0001160990_CovenantLiteObligationsRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_CovenantLiteObligationsRiskMember" xml:lang="en-US">Covenant lite Obligations Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_CovenantLiteObligationsRiskMember" xlink:to="lab_cik0001160990_CovenantLiteObligationsRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_SubprimeRiskMember" xlink:label="loc_cik0001160990_SubprimeRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_SubprimeRiskMember" xml:lang="en-US">Subprime Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_SubprimeRiskMember" xlink:to="lab_cik0001160990_SubprimeRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_ReinvestmentRiskMember" xlink:label="loc_cik0001160990_ReinvestmentRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_ReinvestmentRiskMember" xml:lang="en-US">Reinvestment Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_ReinvestmentRiskMember" xlink:to="lab_cik0001160990_ReinvestmentRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_CallRiskMember" xlink:label="loc_cik0001160990_CallRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_CallRiskMember" xml:lang="en-US">Call Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_CallRiskMember" xlink:to="lab_cik0001160990_CallRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_ForeignNonUSInvestmentRiskMember" xlink:label="loc_cik0001160990_ForeignNonUSInvestmentRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_ForeignNonUSInvestmentRiskMember" xml:lang="en-US">Foreign Non US Investment Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_ForeignNonUSInvestmentRiskMember" xlink:to="lab_cik0001160990_ForeignNonUSInvestmentRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_EmergingMarketsRiskMember" xlink:label="loc_cik0001160990_EmergingMarketsRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_EmergingMarketsRiskMember" xml:lang="en-US">Emerging Markets Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_EmergingMarketsRiskMember" xlink:to="lab_cik0001160990_EmergingMarketsRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_CurrencyRiskMember" xlink:label="loc_cik0001160990_CurrencyRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_CurrencyRiskMember" xml:lang="en-US">Currency Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_CurrencyRiskMember" xlink:to="lab_cik0001160990_CurrencyRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_USGovernmentSecuritiesRiskMember" xlink:label="loc_cik0001160990_USGovernmentSecuritiesRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_USGovernmentSecuritiesRiskMember" xml:lang="en-US">US Government Securities Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_USGovernmentSecuritiesRiskMember" xlink:to="lab_cik0001160990_USGovernmentSecuritiesRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_ConvertibleSecuritiesRiskMember" xlink:label="loc_cik0001160990_ConvertibleSecuritiesRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_ConvertibleSecuritiesRiskMember" xml:lang="en-US">Convertible Securities Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_ConvertibleSecuritiesRiskMember" xlink:to="lab_cik0001160990_ConvertibleSecuritiesRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_SyntheticConvertibleSecuritiesRiskMember" xlink:label="loc_cik0001160990_SyntheticConvertibleSecuritiesRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_SyntheticConvertibleSecuritiesRiskMember" xml:lang="en-US">Synthetic Convertible Securities Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_SyntheticConvertibleSecuritiesRiskMember" xlink:to="lab_cik0001160990_SyntheticConvertibleSecuritiesRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_ContingentConvertibleSecuritiesRiskMember" xlink:label="loc_cik0001160990_ContingentConvertibleSecuritiesRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_ContingentConvertibleSecuritiesRiskMember" xml:lang="en-US">Contingent Convertible Securities Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_ContingentConvertibleSecuritiesRiskMember" xlink:to="lab_cik0001160990_ContingentConvertibleSecuritiesRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_ValuationRiskMember" xlink:label="loc_cik0001160990_ValuationRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_ValuationRiskMember" xml:lang="en-US">Valuation Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_ValuationRiskMember" xlink:to="lab_cik0001160990_ValuationRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_RealEstateRiskMember" xlink:label="loc_cik0001160990_RealEstateRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_RealEstateRiskMember" xml:lang="en-US">Real Estate Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_RealEstateRiskMember" xlink:to="lab_cik0001160990_RealEstateRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_LeverageRiskMember" xml:lang="en-US">Leverage Risk [Member]</link:label>
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          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_SmallerCompanyRiskMember" xlink:label="loc_cik0001160990_SmallerCompanyRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_SmallerCompanyRiskMember" xml:lang="en-US">Smaller Company Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_SmallerCompanyRiskMember" xlink:to="lab_cik0001160990_SmallerCompanyRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_DerivativesRiskMember" xml:lang="en-US">Derivatives Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_DerivativesRiskMember" xlink:to="lab_cik0001160990_DerivativesRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_CreditDefaultSwapsRiskMember" xlink:label="loc_cik0001160990_CreditDefaultSwapsRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_CreditDefaultSwapsRiskMember" xml:lang="en-US">Credit Default Swaps Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_CreditDefaultSwapsRiskMember" xlink:to="lab_cik0001160990_CreditDefaultSwapsRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_CounterpartyRiskMember" xlink:label="loc_cik0001160990_CounterpartyRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_CounterpartyRiskMember" xml:lang="en-US">Counterparty Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_CounterpartyRiskMember" xlink:to="lab_cik0001160990_CounterpartyRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_RepurchaseAgreementsRiskMember" xlink:label="loc_cik0001160990_RepurchaseAgreementsRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_RepurchaseAgreementsRiskMember" xml:lang="en-US">Repurchase Agreements Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_RepurchaseAgreementsRiskMember" xlink:to="lab_cik0001160990_RepurchaseAgreementsRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_CollateralizedBondObligationsCollateralizedLoanObligationsAndCollateralizedDebtObligationsRiskMember" xlink:label="loc_cik0001160990_CollateralizedBondObligationsCollateralizedLoanObligationsAndCollateralizedDebtObligationsRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_CollateralizedBondObligationsCollateralizedLoanObligationsAndCollateralizedDebtObligationsRiskMember" xml:lang="en-US">Collateralized Bond Obligations, Collateralized Loan Obligations and Collateralized Debt Obligations Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_CollateralizedBondObligationsCollateralizedLoanObligationsAndCollateralizedDebtObligationsRiskMember" xlink:to="lab_cik0001160990_CollateralizedBondObligationsCollateralizedLoanObligationsAndCollateralizedDebtObligationsRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_EquitySecuritiesAndRelatedMarketRiskMember" xlink:label="loc_cik0001160990_EquitySecuritiesAndRelatedMarketRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_EquitySecuritiesAndRelatedMarketRiskMember" xml:lang="en-US">Equity Securities and Related Market Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_EquitySecuritiesAndRelatedMarketRiskMember" xlink:to="lab_cik0001160990_EquitySecuritiesAndRelatedMarketRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_PreferredSecuritiesRiskMember" xlink:label="loc_cik0001160990_PreferredSecuritiesRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_PreferredSecuritiesRiskMember" xml:lang="en-US">Preferred Securities Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_PreferredSecuritiesRiskMember" xlink:to="lab_cik0001160990_PreferredSecuritiesRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_InsuranceLinkedAndOtherInstrumentsRiskMember" xlink:label="loc_cik0001160990_InsuranceLinkedAndOtherInstrumentsRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_InsuranceLinkedAndOtherInstrumentsRiskMember" xml:lang="en-US">Insurance Linked and Other Instruments Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_InsuranceLinkedAndOtherInstrumentsRiskMember" xlink:to="lab_cik0001160990_InsuranceLinkedAndOtherInstrumentsRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_PrivatePlacementsAndRestrictedSecuritiesRiskMember" xlink:label="loc_cik0001160990_PrivatePlacementsAndRestrictedSecuritiesRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_PrivatePlacementsAndRestrictedSecuritiesRiskMember" xml:lang="en-US">Private Placements and Restricted Securities Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_PrivatePlacementsAndRestrictedSecuritiesRiskMember" xlink:to="lab_cik0001160990_PrivatePlacementsAndRestrictedSecuritiesRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_SecuritiesLendingRiskMember" xlink:label="loc_cik0001160990_SecuritiesLendingRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_SecuritiesLendingRiskMember" xml:lang="en-US">Securities Lending Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_SecuritiesLendingRiskMember" xlink:to="lab_cik0001160990_SecuritiesLendingRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_InflationdeflationRiskMember" xlink:label="loc_cik0001160990_InflationdeflationRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_InflationdeflationRiskMember" xml:lang="en-US">InflationDeflation Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_InflationdeflationRiskMember" xlink:to="lab_cik0001160990_InflationdeflationRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_RegulatoryChangesRiskMember" xlink:label="loc_cik0001160990_RegulatoryChangesRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_RegulatoryChangesRiskMember" xml:lang="en-US">Regulatory Changes Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_RegulatoryChangesRiskMember" xlink:to="lab_cik0001160990_RegulatoryChangesRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_RegulatoryRiskCommodityPoolOperatorMember" xlink:label="loc_cik0001160990_RegulatoryRiskCommodityPoolOperatorMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_RegulatoryRiskCommodityPoolOperatorMember" xml:lang="en-US">Regulatory Risk Commodity Pool Operator [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_RegulatoryRiskCommodityPoolOperatorMember" xlink:to="lab_cik0001160990_RegulatoryRiskCommodityPoolOperatorMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_LiquidityRiskMember" xlink:label="loc_cik0001160990_LiquidityRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_LiquidityRiskMember" xml:lang="en-US">Liquidity Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_LiquidityRiskMember" xlink:to="lab_cik0001160990_LiquidityRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_StructuredInvestmentsRiskMember" xlink:label="loc_cik0001160990_StructuredInvestmentsRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_StructuredInvestmentsRiskMember" xml:lang="en-US">Structured Investments Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_StructuredInvestmentsRiskMember" xlink:to="lab_cik0001160990_StructuredInvestmentsRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_TaxRiskMember" xlink:label="loc_cik0001160990_TaxRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_TaxRiskMember" xml:lang="en-US">Tax Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_TaxRiskMember" xlink:to="lab_cik0001160990_TaxRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_SubsidiaryRiskMember" xlink:label="loc_cik0001160990_SubsidiaryRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_SubsidiaryRiskMember" xml:lang="en-US">Subsidiary Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_SubsidiaryRiskMember" xlink:to="lab_cik0001160990_SubsidiaryRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_PortfolioTurnoverRiskMember" xlink:label="loc_cik0001160990_PortfolioTurnoverRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_PortfolioTurnoverRiskMember" xml:lang="en-US">Portfolio Turnover Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_PortfolioTurnoverRiskMember" xlink:to="lab_cik0001160990_PortfolioTurnoverRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_OperationalRiskMember" xlink:label="loc_cik0001160990_OperationalRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_OperationalRiskMember" xml:lang="en-US">Operational Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_OperationalRiskMember" xlink:to="lab_cik0001160990_OperationalRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_OtherInvestmentCompaniesRiskMember" xlink:label="loc_cik0001160990_OtherInvestmentCompaniesRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_OtherInvestmentCompaniesRiskMember" xml:lang="en-US">Other Investment Companies Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_OtherInvestmentCompaniesRiskMember" xlink:to="lab_cik0001160990_OtherInvestmentCompaniesRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_PrivacyAndDataSecurityRiskMember" xlink:label="loc_cik0001160990_PrivacyAndDataSecurityRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_PrivacyAndDataSecurityRiskMember" xml:lang="en-US">Privacy and Data Security Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_PrivacyAndDataSecurityRiskMember" xlink:to="lab_cik0001160990_PrivacyAndDataSecurityRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_ConfidentialInformationAccessRiskMember" xlink:label="loc_cik0001160990_ConfidentialInformationAccessRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_ConfidentialInformationAccessRiskMember" xml:lang="en-US">Confidential Information Access Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_ConfidentialInformationAccessRiskMember" xlink:to="lab_cik0001160990_ConfidentialInformationAccessRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_CyberSecurityRiskMember" xlink:label="loc_cik0001160990_CyberSecurityRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_CyberSecurityRiskMember" xml:lang="en-US">Cyber Security Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_CyberSecurityRiskMember" xlink:to="lab_cik0001160990_CyberSecurityRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_PotentialConflictsOfInterestRiskallocationOfInvestmentOpportunitiesMember" xlink:label="loc_cik0001160990_PotentialConflictsOfInterestRiskallocationOfInvestmentOpportunitiesMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_PotentialConflictsOfInterestRiskallocationOfInvestmentOpportunitiesMember" xml:lang="en-US">Potential Conflicts of Interest Risk Allocation of Investment Opportunities [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_PotentialConflictsOfInterestRiskallocationOfInvestmentOpportunitiesMember" xlink:to="lab_cik0001160990_PotentialConflictsOfInterestRiskallocationOfInvestmentOpportunitiesMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_MarketDisruptionsRiskMember" xlink:label="loc_cik0001160990_MarketDisruptionsRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_MarketDisruptionsRiskMember" xml:lang="en-US">Market Disruptions Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_MarketDisruptionsRiskMember" xlink:to="lab_cik0001160990_MarketDisruptionsRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_FocusedInvestmentRiskMember" xlink:label="loc_cik0001160990_FocusedInvestmentRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_FocusedInvestmentRiskMember" xml:lang="en-US">Focused Investment Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_FocusedInvestmentRiskMember" xlink:to="lab_cik0001160990_FocusedInvestmentRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_CertainAffiliationsMember" xlink:label="loc_cik0001160990_CertainAffiliationsMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_CertainAffiliationsMember" xml:lang="en-US">Certain Affiliations [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_CertainAffiliationsMember" xlink:to="lab_cik0001160990_CertainAffiliationsMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_AntiTakeoverProvisionsMember" xlink:label="loc_cik0001160990_AntiTakeoverProvisionsMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_AntiTakeoverProvisionsMember" xml:lang="en-US">Anti Takeover Provisions [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_AntiTakeoverProvisionsMember" xlink:to="lab_cik0001160990_AntiTakeoverProvisionsMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260604.xsd#cik0001160990_FundDistributionRatesMember" xlink:label="loc_cik0001160990_FundDistributionRatesMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_FundDistributionRatesMember" xml:lang="en-US">Fund Distribution Rates [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_FundDistributionRatesMember" xlink:to="lab_cik0001160990_FundDistributionRatesMember" />
        </link:labelLink>
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  <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
  <import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <import namespace="http://xbrl.sec.gov/dei/2025" schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd" />
  <import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd" />
  <import namespace="http://xbrl.sec.gov/cef/2025" schemaLocation="https://xbrl.sec.gov/cef/2025/cef-2025.xsd" />
  <import namespace="http://xbrl.sec.gov/cef-pre/2025" schemaLocation="https://xbrl.sec.gov/cef/2025/cef-2025_pre.xsd" />
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  <element name="MarketRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_MarketRiskMember" substitutionGroup="xbrli:item" />
  <element name="AssetAllocationRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_AssetAllocationRiskMember" substitutionGroup="xbrli:item" />
  <element name="ManagementRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_ManagementRiskMember" substitutionGroup="xbrli:item" />
  <element name="IssuerRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_IssuerRiskMember" substitutionGroup="xbrli:item" />
  <element name="CreditRisksMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_CreditRisksMember" substitutionGroup="xbrli:item" />
  <element name="MortgageRelatedAndOtherAssetBackedInstrumentsRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_MortgageRelatedAndOtherAssetBackedInstrumentsRiskMember" substitutionGroup="xbrli:item" />
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  <element name="ZeroCouponBondsStepUpsandPaymentInKindSecuritiesRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_ZeroCouponBondsStepUpsandPaymentInKindSecuritiesRiskMember" substitutionGroup="xbrli:item" />
  <element name="LoansAndOtherIndebtednessLoanAcquisitionsParticipationsAndAssignmentsRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_LoansAndOtherIndebtednessLoanAcquisitionsParticipationsAndAssignmentsRiskMember" substitutionGroup="xbrli:item" />
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  <element name="CurrencyRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_CurrencyRiskMember" substitutionGroup="xbrli:item" />
  <element name="USGovernmentSecuritiesRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_USGovernmentSecuritiesRiskMember" substitutionGroup="xbrli:item" />
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  <element name="RealEstateRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_RealEstateRiskMember" substitutionGroup="xbrli:item" />
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  <element name="SmallerCompanyRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_SmallerCompanyRiskMember" substitutionGroup="xbrli:item" />
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  <element name="CreditDefaultSwapsRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_CreditDefaultSwapsRiskMember" substitutionGroup="xbrli:item" />
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  <element name="RepurchaseAgreementsRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_RepurchaseAgreementsRiskMember" substitutionGroup="xbrli:item" />
  <element name="CollateralizedBondObligationsCollateralizedLoanObligationsAndCollateralizedDebtObligationsRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_CollateralizedBondObligationsCollateralizedLoanObligationsAndCollateralizedDebtObligationsRiskMember" substitutionGroup="xbrli:item" />
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</schema>
