Synonyms: 2H-Azepin-2-one,1,1'-terephthaloylbis[hexahydro- (6CI,7CI,8CI);N,N'-Terephthaloylbis(caprolactam); N,N'-Terephthaloylbis(e-caprolactam);N,N'-Terephthaloyldi-e-caprolactam; N,N'-Terephthaloyldicaprolactam;Terephthaloylbis(N-caprolactam); Terephthaloylbis(e-caprolactam); Terephthaloylbiscaprolactam