ethyl (S)-4-azido-2-benzyloxycarbonylaminobutanoate

Cbz-Gln-OMe

(S)-methyl 4-amino-2-(((benzyloxy)carbonyl)amino)butanoate

N-苄氧羰基-L-谷氨酰胺

(3S)-4-ethoxy-4-oxo-3-(phenylmethoxycarbonylamino)butanoate