{(R)-1-[(1S,2S,4R)-4-((S)-1-Benzylcarbamoyl-2-methyl-propylcarbamoyl)-2-hydroxy-1-isobutyl-pentylcarbamoyl]-2-methylsulfanyl-ethyl}-carbamic acid tert-butyl ester

((S)-1-{(R)-1-[(1S,2S,4R)-4-((S)-1-Benzylcarbamoyl-2-methyl-propylcarbamoyl)-2-hydroxy-1-isobutyl-pentylcarbamoyl]-2-methylsulfanyl-ethylcarbamoyl}-2-methyl-propyl)-carbamic acid tert-butyl ester

((S)-1-{(S)-2-Allylcarbamoyl-1-[(1S,2S,4R)-4-((S)-1-benzylcarbamoyl-2-methyl-propylcarbamoyl)-2-(tert-butyl-dimethyl-silanyloxy)-1-isobutyl-pentylcarbamoyl]-ethylcarbamoyl}-2-methyl-propyl)-carbamic acid allyl ester

tert-butyl (1S,2S,4R)-5-({(1S)-1-[(benzylamino)carbonyl]-2-methylpropyl}amino)-2-hydroxy-1-isobutyl-4-methyl-5-oxopentylcarbamate

(2R,4S,5S)-5-Amino-4-(tert-butyl-dimethyl-silanyloxy)-2,7-dimethyl-octanoic acid ((S)-1-benzylcarbamoyl-2-methyl-propyl)-amide