1H-Imidazole-4-propanamide, N-[2-hydroxy-6-methyl-1-(2-methylpropyl)-4-[[[2-methyl-1-[[(2-pyridinylmethyl)amino]carbonyl]butyl]amino]carbonyl]heptyl]-.alpha.-[(phenyloxyacetyl)-amino]-, [1S-[1R*(R*),2R*,4S*(1R*,2R*)]] AIDS-081457 AIDS081457 POA-His-LLA-Ile-Amp