(-)-5-Ethyl-5-phenylhydantoin (-)-Nirvanol (R)-5-Ethyl-5-phenyl-2,4-imidazolidinedione (R)-Nirvanol 2,4-Imidazolidinedione, 5-ethyl-5-phenyl-, (R)- (9CI) 5-24-08-00092 (Beilstein Handbook Reference) 65567-32-0 BRN 0085312 Hydantoin, 5-ethyl-5-phenyl-, (-)- Nirvanol, L- l-5-Ethyl-5-phenylhydantoin l-Nirvanol