| http://www.w3.org/ns/prov#value | - formula H2 N-Y-OH wherein Y is a phenyl or pyridine group and the H2 N group and the OH group are linked through Y at the 1,3 or 1,4 positions, said compounds (A) and (B) being reacted in about a 1:2 molar ratio and under conditions wherein said CRO group of (A) and said NH2 group of (B) react. 2.
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