(1,1'-Biphenyl)-4,4'-dicarboxylic acid, dimethyl ester, polymer with 1,4-benzenedicarboxylic acid, dimethyl ester and 1,2-ethanediol (1,1'-Biphenyl)-4,4'-dicarboxylic acid, dimethyl ester, polymer with dimethyl 1,4-benzenedicarboxylate and 1,2-ethanediol 66747-18-0