AIDS-165656 AIDS165656 L-Alaninamide, N-acetyl-L-.alpha.-aspartyl-L-.alpha.-glutamyl-.beta.-phenyl-L-phenylalanyl-L-.alpha.-glutamyl-3-cyclohexyl-N1-[(1R)-3-[(2-cyclopropylphenyl)amino]-1-(mercaptomethyl)-2,3-dioxopropyl]-