3,3'-(1,4-Piperazinediyldimethylene)bis(5,5-dimethylhydantoin) 5-24-05-00349 (Beilstein Handbook Reference) 747-04-6 BRN 0722558 Hydantoin, 3,3'-(1,4-piperazinediyldimethylene)bis(5,5-dimethyl- NSC 150488