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isaphttp://webisa.webdatacommons.org/prov/
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provhttp://www.w3.org/ns/prov#
xsdhhttp://www.w3.org/2001/XMLSchema#
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isa:273435411
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when Y is oxygen or sulfur in Formula 9, and W is a covalent bond, at least one R4 or R4??? must be ???OH, ???ONO2, ???NO2 or ???CH2ONO2 or R4 and R4??? taken together with the carbon atom to which they are attached are a cycloalkyl group or a heterocyclic ring;
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n5:com
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