N-<(8-propyl-6-pyridin-3-yl-1,2,4-triazolo<4,3-a>pyrazin-3-yl)-acetyl>-(3R,4S)-4-amino-5-cyclohexyl-2,2-difluoro-3-hydroxypentanoic acid (S)-2-methylbutylamide

1,1-dimethylethyl <1-<<<1(S)-(cyclohexylmethyl)-3,3-difluoro-2(R)-hydroxy-4-<<2-(4-morpholinyl)ethyl>amino>-4-oxobutyl>amino>carbonyl>-3(S)-butenyl>carbamate

N-(4-morpholinylsulfonyl)-phenylalanyl-N-<1-(cyclohexylmethyl)-3,3-difluoro-2-hydroxy-4-<<2-(4-morpholinyl)ethyl>amino>-4-oxobutyl>-histidinamide

(4-{(S)-2-[(1S,2R)-1-Cyclohexylmethyl-3,3-difluoro-2-hydroxy-3-(2-morpholin-4-yl-ethylcarbamoyl)-propylcarbamoyl]-2-[(S)-2-(morpholine-4-sulfonylamino)-3-phenyl-propionylamino]-ethyl}-thiazol-2-yl)-carbamic acid trichloromethyl ester

(3R,4S)-4-Amino-5-cyclohexyl-2,2-difluoro-3-hydroxy-pentanoic acid ethyl ester