| http://www.w3.org/ns/prov#value | - When the polyvalent coupling group has a substituent, examples of the substituent include an alkyl group having 1 to 20 carbon atoms, such as a methyl group or an ethyl group; an aryl group having 6 to 16 carbon atoms, such as a phenyl group or a naphthyl group; an acyloxy group having 1 to 6 carbon atoms, such as a hydroxyl group, a carboxyl group, a sulfonamide group, an N-sulfonylamide group or
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