{(1S,2R,4R)-1-Benzyl-2-(tert-butyl-dimethyl-silanyloxy)-4-[(S)-1-((S)-1-carbamoyl-2-phenyl-ethylcarbamoyl)-3-methyl-butylcarbamoyl]-5-phenyl-pentyl}-carbamic acid tert-butyl ester

tert-butyldimethylsilyl (2R,4R,5S)-2-benzyl-5-((tert-butoxycarbonyl)amino)-4-((tert-butyldimethylsilyl)oxy)-6-phenylhexanoate