3,6-bis(3'-benzyloxycarbonylaminopropyl)-5-methyl-2(1H)-pyrazinone

benzyltert-butyl (5-((6-(((benzyloxy)carbonyl)amino)-1-chloro-2-oxohexan-3-yl)amino)-5-oxopentane-1,4-diyl)dicarbamate

(4-Amino-6-chloro-5-oxo-hexyl)-carbamic acid benzyl ester

(4-tert-Butoxycarbonylamino-6-chloro-5-oxo-hexyl)-carbamic acid benzyl ester

5-Benzyloxycarbonylamino-2(S)-tert-butoxycarbonylaminopentanoic acid