(9H-fluoren-9-yl)methyl ((S)-2-((1S,2S)-2-(hydroxymethyl)cyclopropyl)-1-phenylethyl)carbamate

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

(9H-fluoren-9-yl)methyl ((S)-2-((1S,2S)-2-((tert-butoxycarbonyl)amino)cyclopropyl)-1-phenylethyl)carbamate

tert-butyl ((1S,2S)-2-((S)-2-((S)-2-(((benzyloxy)carbonyl)amino)propanamido)-2-phenylethyl)cyclopropyl)carbamate