21616-41-1 3,3'-(1,4-Piperazinediyldimethylene)bis(5,5-diphenyl-2,4-dithiohydantoin) 5-24-08-00411 (Beilstein Handbook Reference) BRN 0738325 Hydantoin, 3,3'-(1,4-piperazinediyldimethylene)bis(5,5-diphenyl-2,4-dithio-