(S)-ethyl 1-(2-azido-6-(tert-butoxycarbonylamino)hexanoyl)piperidine-4-carboxylate

(S)-4-(5-azido-6-(4-(ethoxycarbonyl)piperidin-1-yl)-6-oxohexylamino)-4-oxobutanoic acid

(S)-4-(6-(4-(ethoxycarbonyl)piperidin-1-yl)-6-oxo-5-(4-((2-sulfamoylbenzo[d]thiazol-6-yloxy)methyl)-1H-1,2,3-triazol-1-yl)hexylamino)-4-oxobutanoic acid