(-N=C(CH3)-NH-C6H3(C(O)OH)-C6H3(C(O)OH)-NH-C(CH3)=N-C6H4-CH2-C6H4-)n
(-N=C*(CH3)-NH-C6H3(C(O)OH)-C6H3(C(O)OH)-NH-C*(CH3)=N-C6H4-CH2-C6H4-)n
4,4'-diaminodiphenyl-3,3'-dicarboxylic acid copolymer with 4,4'-diacetamidodiphenylmethane
carboxylic acid, hydroxyl(organic), nitrogen, oxygen, phenyl benzene, polymer