| http://www.w3.org/ns/prov#value | - said substitution(s), when present, are independently selected from the group consisting of C1-6 alkyl straight or branched chain, benzyl, halogen, trihalomethyl, C1-6 alkoxy, ???NO2, ???NH2, ???OH, ???O, -COOR??? where R??? is H or lower alkyl, ???CH2OH, and -CONH2; and one but not both of R1 or R2 is a conjugating group.
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