benzyl 2-[[1-[[5-[[amino(nitramido)methylidene]amino]-1-methoxy-1-oxopentan-2-yl]amino]-1-oxo-3-phenylpropan-2-yl]carbamoyl]pyrrolidine-1-carboxylate

1-[(苄氧基)羰基]-L-脯氨酰甘氨酰甘氨酸

(2S)-N-methylpyrrolidine-2-carboxamide

(2S)-N-Benzyloxycarbony-2-(1'-hydroxy-1'-methylethyl)pyrrolidine

L-proline-L-leucine methyl ester