3-Phenyl-5-methyl-2-thioguidanthion 4-Imidazolidinone, 5-methyl-3-phenyl-2-thioxo- 4333-19-1 5-Methyl-3-phenyl-2-thiohydantoin 5-Methyl-3-phenyl-2-thioxoimidazolidin-4-one Alanine phenylthiohydantoin EINECS 224-373-6 Hydantoin, 5-methyl-3-phenyl-2-thio- PTH-alanine