tert-butyl 2-(N-(N-((R)-2-((3-((tert-butoxycarbonyl)amino)propanoyl)oxy)-4-methylpentanoyl)-L-prolyl-L-isoleucyl-N-methyl-L-valyl)-N-methyl-L-alanyl)hydrazine-1-carboxylate

(R)-2-羟基-4-甲基戊酸

tert-butyl 2-((S)-2-((S)-N,3-dimethyl-2-(methylamino)butanamido)propanoyl)hydrazinecarboxylate

benzyl ((R)-2-hydroxy-4-methylpentanoyl)-L-prolinate

Cbz-MeVal-MeAla-NHNHBoc