Synonyms: Hydantoin,5-ethyl-3-methyl-5-phenyl- (6CI,7CI,8CI);3-Ethylnirvanol;3-Methyl-5-ethyl-5-phenyl-2,4-imidazolidinedione;3-Methyl-5-ethyl-5-phenylhydantoin;5-Ethyl-3-methyl-5-phenyl-2,4(3H,5H)-imidazoledione;5-Ethyl-3-methyl-5-phenylhydantoin;5-Ethyl-3-methyl-5-phenylimidazolidin-2,4-dione;DL-Mephenytoin;Epiazin;Epilan;Fenantoin;Gerot-Epilan;Insulton;Mephenytoin;Mesantoin;Mesdontoin;Mesontoin;Methoin;Methylphenetoin;Metydan;NSC 34652;Phenantoin;Phenylethylmethylhydantoin;Sacerno;Sedantional;Sedantoin;Triantoin;