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

Boc-(τ-N-methyl)His amide of (3S,4S)-1-<<(3-methylbutyl)carbonyl>amino>-3-hydroxy-4-amino-5-cyclohexylpentane

(3S,4S)-1-<<<(dimethylamino)methyl>carbonyl>amino>-3-hydroxy-4-<(tert-butoxycarbonyl)amino>-5-cyclohexylpentane

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

(3S,4S)-1-<<(2-methylpropyl)carbonyl>amino>-3-hydroxy-4-<(tert-butyloxycarbonyl)amino>-5-cyclohexylpentane