| http://www.w3.org/ns/prov#value | - C.More particularly, it has been discovered that biphenyl anhydrides having the structure ##STR5##wherein A is selected from the group consisting of ##STR6##wherein each R.sup.0 is individually a monovalent radical selected from the group consisting of hydrogen, halogen, hydroxy, alkyl radical having from 1 to 5 carbon atoms, and ##STR7## wherein R is an alkyl radical having from 1 to 5 carbon ato
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