AIDS-165651 AIDS165651 L-Alaninamide, N-acetyl-L-.alpha.-aspartyl-L-.alpha.-glutamyl-.beta.-phenyl-L-phenylalanyl-L-.alpha.-glutamyl-3-cyclohexyl-N1-[(1R)-1-(mercaptomethyl)-2,3-dioxo-3-[(2-phenylethyl)amino]propyl]-