(S)-N-叔丁氧羰基-2-吡咯烷酮-5-甲酸叔丁酯

H-Glu(OChp)-OH

Cbz-L-谷氨酸 1-苄酯

tert-butyl (4S,4'S,5'R)-4-amino-5-(3',4'-dimethyl-2'-oxo-5'-phenyl-1'-imidazolydinyl)-5-oxopentanoate