苯丙氨酸 Traditional form: 苯丙氨酸 Pinyin (reading): běnbǐng'ānsuān Definitions: phenylalanine (Phe), an essential amino acid Characters: 苯 - benzene, benzol 丙 - third; 3rd heavenly stem 氨 - ammonia 酸 - tart, sour; spoiled; acid Traditional characters: 苯 - benzene, benzol 丙 - third; 3rd heavenly stem 氨 - ammonia 酸 - tart, sour; spoiled; acid