(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

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

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

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

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