N-(4-morpholinylsulfonyl)-L-phenylalanyl-4,5-didehydro-N-<3,3-difluoro-4-<<2-(4-morpholinyl)ethyl>amino>-2,4-dioxo-1(S)-(phenylmethyl)butyl>-L-norvalinamide

{(S)-1-[(S)-2-((1S,2R)-1-Benzyl-3,3-difluoro-2-hydroxy-3-methylcarbamoyl-propylcarbamoyl)-pyrrolidine-1-carbonyl]-2-methyl-propyl}-carbamic acid tert-butyl ester

((3R,4S)-4-{[(S)-1-((S)-2-tert-Butoxycarbonylamino-3-methyl-butyryl)-pyrrolidine-2-carbonyl]-amino}-2,2-difluoro-3-hydroxy-5-phenyl-pentanoylamino)-acetic acid methyl ester

((S)-1-{(S)-2-[(1S,2R)-1-Benzyl-3-(benzyl-methyl-carbamoyl)-3,3-difluoro-2-hydroxy-propylcarbamoyl]-pyrrolidine-1-carbonyl}-2-methyl-propyl)-carbamic acid tert-butyl ester