2,4-Imidazolidinedione, 5,5-dimethyl-3-phenyl- 5,5-Dimethyl-3-phenylhydantoin 5-24-05-00355 (Beilstein Handbook Reference) 70974-10-6 BRN 0156956 Hydantoin, 5,5-dimethyl-3-phenyl-