| http://www.w3.org/ns/prov#value | - The composition of claim 4 wherein said (A) compound has the formula ##STR12## wherein Y1 is a heterocyclic substituent selected from the group consisting of pyrrole, imidazole and dihydroimidazole such that Y1 is in a position other than 2 in the benzene ring, and Y2 is --H, --OH or --OCH3.
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