3-Phenyl-2-thiohydantoin-5-acetic acid 4-IMIDAZOLIDINEACETIC ACID, 5-OXO-1-PHENYL-2-THIOXO- 5-Hydantoinacetic acid, 3-phenyl-2-thio- (6CI) 5-Oxo-1-phenyl-2-thioxo-4-imidazolidineacetic acid 5-Oxo-1-phenyl-2-thioxoimidazolidine-4-acetic acid 5624-13-5 Aspartic acid phenylthiohydantoin Aspartic phenylthiohydantoin EINECS 227-055-5