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

N-<1-oxo-3-(3-pyridinyl)propyl>-L-phenylalanyl-N-<1(S)-(cyclohexylmethyl)-3,3-difluoro-2(R)-hydroxy-4-<<2-(4-morpholinyl)ethyl>amino>-4-oxobutyl>-4,5-didehydro-L-norvalinamide

N-<3-(3-pyridinyl)-1-oxopropyl>-L-phenylalanyl-N-<1-(cyclohexylmethyl)-3,3-difluoro-4-<<2-(4-morpholinyl)ethyl>amino>-2,4-dioxobutyl>-4,5-didehydro-L-norvalinamide

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

N-(1-piperazinylsulfonyl)-L-phenylalanyl-N-<1(S)-(cyclohexylmethyl)-3,3-difluoro-2(R)-hydroxy-4-<<2-(4-morpholinyl)ethyl>amino>-4-oxobutyl>-4,5-didehydro-L-norvalinamide