N,N'-二叔丁氧羰基-L-赖氨酸对硝基苯酚酯

5-氨基-5-氧代庚酸

(S)-3-氨基-2-己内酰胺

H-GLU(H-LYS-OH)-OH

dimethyl (2S)-6-methoxypiperidine-1,2-dicarboxylate