2,4-Imidazolidinedione, 3,3'-((2-methyl-1,4-piperazinediyl)bis(methylene)) bis(5,5-diphenyl- 26786-94-7 5-24-08-00380 (Beilstein Handbook Reference) BRN 0738563 Hydantoin, 3,3'-((2-methyl-1,4-piperazinediyl)dimethylene)bis(5,5-diphenyl- N,N'-Bis(5,5-diphenylhydantoinylmethyl-3)-2-methylpiperazine