| http://www.w3.org/ns/prov#value | - group, an aryloxy group, an alkoxycarbonyl group, an alkylaminocarbonyl group, a dialkylaminocarbonyl group, an alkylcarbonylamino group, a phenylcarbonylamino group, a phenylaminocarbonyl group, or a phenoxycarbonyl group; and X is a hydrogen atom, a
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