N-羧氧苄基-L-谷氨酸甲酯

γ-L-谷氨酰基-4-硝基苯胺

N-苄氧羰基-L-谷氨酸γ-叔丁酯

1-O-benzyl 2-O-methyl (2S)-5-oxopiperidine-1,2-dicarboxylate

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