苄氧羰基-甘氨酰-D-苯丙氨酸

benzyl N-[(4-nitrophenyl)methyl]carbamate

（R）-4-N-Cbz-哌嗪-2-甲酸甲酯

1-(2,5-二氧代-1-吡咯烷基)5-甲基N-[(苄氧基)羰基]-L-谷氨酸

benzyl 3-hydroxy-2-(phenylmethoxycarbonylamino)propanoate