1H-Imidazole-4-propanamide, N-(1-(cyclohexylmethyl)-2-hydroxy-5-methyl-4-[[[2-methyl-1-[[(2-pyridinylmethyl)amino]carbonyl]butyl]amino]carbonyl]hexyl]-.alpha.-[(phenoxyacetyl)amino]-, [1S-[1R*(R*),2R*,4R*(1R*,2R*)]]- AIDS-081464 AIDS081464 NOA-His-Cha.psi.[CH(OH)CH2]Val-Ile-Amp