AIDS-163361 AIDS163361 L-.alpha.-Glutamine, N-[(2S)-2-(acetylamino)-1-oxobutyl]-L-.alpha.-glutamyl-.beta.-phenyl-L-phenylalanyl-N1-[(1S)-2-[[(1S)-1-(carboxycarbonyl)-3,3-difluoropropyl]amino]-1-(cyclohexylmethyl)-2-oxoethyl]-