{(S)-1-[(S)-1-[(1S,2S)-1-Cyclohexylmethyl-2-hydroxy-4-(3-methyl-butyrylamino)-butylcarbamoyl]-2-(1H-imidazol-4-yl)-ethylcarbamoyl]-2-phenyl-ethyl}-carbamic acid tert-butyl ester

{(S)-1-[(S)-1-[(1S,2S)-1-Cyclohexylmethyl-2-hydroxy-4-(4-methyl-pentanoylamino)-butylcarbamoyl]-2-(1H-imidazol-4-yl)-ethylcarbamoyl]-2-phenyl-ethyl}-carbamic acid tert-butyl ester

Boc-Phe-His amide of (3S,4S)-1-<(3-methylbutyl)(benzyloxycarbonyl)amino>-3-hydroxy-4-amino-5-cyclohexylpentane

((S)-1-{(S)-1-[(1S,2S)-1-Cyclohexylmethyl-2-hydroxy-4-(4-methyl-pentanoylamino)-butylcarbamoyl]-2-phenyl-ethylcarbamoyl}-2-phenyl-ethyl)-carbamic acid tert-butyl ester

((S)-1-{1-[(1S,2S)-1-Cyclohexylmethyl-2-hydroxy-4-(4-methyl-pentanoylamino)-butylcarbamoyl]-2-thiazol-4-yl-ethylcarbamoyl}-2-phenyl-ethyl)-carbamic acid tert-butyl ester