5-ethoxy-5-oxo-4-(phenylmethoxycarbonylamino)pentanoic acid

N-苄氧羰基-L-谷氨酸 alpha-甲基酯二环己基铵盐

H-GLU-VAL-OH

N-苯基谷氨酰胺

苄氧羰基-谷氨酰胺