pemoline2-Amino-5-phenyl-4(5H)-oxazolone2-imino-4-keto-5-phenyltetrahydrooxazole2-imino-5-phenyl-4-oxazolidinone5-phenyl-2-imino-4-oxazolidinone5-phenyl-2-imino-4-oxooxazolidine5-phenylisohydantionpheniminooxazolidinonephenylisohydantoinphenylpseudohydantoin