AIDS-165658 AIDS165658 L-Alaninamide, N-acetyl-L-.alpha.-aspartyl-L-.alpha.-glutamyl-.beta.-phenyl-L-phenylalanyl-L-.alpha.-glutamyl-N1-[(1R)-3-[[2-(2-chlorophenyl)ethyl]amino]-1-(mercaptomethyl)-2,3-dioxopropyl]-3-cyclohexyl-