175649-47-5 1,4-Benzenedicarboxylic acid, polymer with hexahydro-2H-azepin-2-one and .alpha.,.alpha.-[(1-methylethylidene)di-4,1-phenylene]bis[.omega.-hydroxypoly(oxy-1,2-ethanediyl)]
73546-13-1 1,4-Benzenedicarboxylic acid,polymers,polymer with 4-aminobenzoic acid and 1,2-ethanediol