methyl (S)-1-(2-((2S,3S)-3-amino-2-hydroxy-4-phenylbutyl)-2-(4-(pyridin-2-yl)benzyl)hydrazinyl)-4-methyl-1-oxopentan-2-ylcarbamate

methyl (S)-1-(2-((2S,3S)-2-hydroxy-3-((1S,3R)-3-(methoxycarbonylamino)-2,2-dimethylcyclobutanecarboxamido)-4-phenylbutyl)-2-(4-(pyridin-2-yl)benzyl)hydrazinyl)-4-methyl-1-oxopentan-2-ylcarbamate

methyl ((S)-1-(2-((2S,3S)-3-((1S,3R)-3-acetamido-2,2-dimethylcyclobutane-1-carboxamido)-2-hydroxy-4-phenylbutyl)-2-(4-(pyridin-2-yl)benzyl)hydrazineyl)-4-methyl-1-oxopentan-2-yl)carbamate