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

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

(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

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

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