| http://www.w3.org/ns/prov#value | - R6 and R9 are independently selected from the group consisting of hydrogen, carboxyl, carboxylalkyl, acyl, acylamino, aminoacyl, alkyl, substituted alkyl other than iodoalkyl, alkenyl, substituted alkenyl, alkoxy, substituted alkoxy, aryl, heteroaryl, heterocyclic, halo other than iodo, hydroxyl, nitro, and a saccharide;
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