benzyl (S)-5-((2-(benzyloxy)-2-oxoethyl)amino)-4-(4-(((benzyloxy)carbonyl)(methyl)amino)benzamido)-5-oxopentanoate

6-溴乙基-喋啶-2,4-二胺

(S)-5-((carboxymethyl)amino)-4-(4-(methylamino)benzamido)-5-oxopentanoic acid