(2R,3S)-N-((1S,2S)-2-((2R,3R)-3-((S)-2-(2-naphthamido)propanamido)-5-phenylpentan-2-yl)cyclopropyl)-3-((S)-sec-butyl)-4-oxooxetane-2-carboxamide

tert-butyl ((1S,2S)-2-((2R,3R)-3-amino-5-phenylpentan-2-yl)cyclopropyl)carbamate

(1S,2S)-2-((2R,3R)-3-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-5-phenylpentan-2-yl)cyclopropane-1-carboxylic acid

benzyl ((S)-1-(((3R,4R)-4-((1S,2S)-2-aminocyclopropyl)-1-phenylpentan-3-yl)amino)-1-oxopropan-2-yl)carbamate

(S)-N-((R)-2-((1S,2S)-2-(((tert-butyldiphenylsilyl)oxy)methyl)cyclopropyl)propylidene)-2-methylpropane-2-sulfinamide

(3S,4R)-3-((S)-sec-butyl)-4-oxooxetane-2-carboxylic acid

(9H-fluoren-9-yl)methyl ((3R,4R)-4-((1S,2S)-2-formylcyclopropyl)-1-phenylpentan-3-yl)carbamate

(9H-fluoren-9-yl)methyl ((3R,4R)-4-((1S,2S)-2-((tert-butoxycarbonyl)amino)cyclopropyl)-1-phenylpentan-3-yl)carbamate

(R)-2-((1R,2S)-2-(((tert-butyldiphenylsilyl)oxy)methyl)cyclopropyl)propanal

benzyl ((S)-1-(((3R,4R)-4-((1S,2S)-2-((2R,3S)-3-((S)-sec-butyl)-4-oxooxetane-2-carboxamido)cyclopropyl)-1-phenylpentan-3-yl)amino)-1-oxopropan-2-yl)carbamate

(S)-N-((3R,4R)-4-((1S,2S)-2-(((tert-butyldiphenylsilyl)oxy)methyl)cyclopropyl)-1-phenylpentan-3-yl)-2-methylpropane-2-sulfinamide

(R)-4-benzyl-3-((R)-2-((1R,2S)-2-(((tert-butyldiphenylsilyl)oxy)methyl)cyclopropyl)propanoyl)oxazolidin-2-one

(9H-fluoren-9-yl)methyl ((3R,4R)-4-((1S,2S)-2-(hydroxymethyl)cyclopropyl)-1-phenylpentan-3-yl)carbamate

tert-butyl ((1S,2S)-2-((2R,3R)-3-((S)-2-(((benzyloxy)carbonyl)amino)propanamido)-5-phenylpentan-2-yl)cyclopropyl)carbamate