N-(4-morpholinylsulfonyl)-β-oxo-L-phenylalanyl-N-<1(S)-(cyclohexylmethyl)-3,3-difluoro-4-<<2-(4-morpholinyl)ethyl>amino>-2,4-dioxobutyl>-4,5-didehydro-L-norvalinamide

(S)-N-(4-morpholinylsulfonyl)-L-phenylalanyl-3-(2-amino-4-thiazolyl)-N-<1-(cyclohexylmethyl)-3,3-difluoro-4-<<2-(4-morpholinyl)ethyl>amino>-2,4-dioxobutyl>-L-alaninamide

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-oxopentanoic acid (S)-2-methylbutylamide

6(S)-amino-7-cyclohexyl-4,4-difluoro-3(R),5(R)-dihydroxy-2-methylheptane