1-Naphthoxyacetyl-L-histidyl-5S-amino-6-cyclohexyl-3R,4R-dihydroxy-2S-isobutyl-7-methyl-octanoyl-L-isoleucyl-2-pyridylmethylamide AIDS-081500 AIDS081500 NOA-His-(R,R)-LLd-Ile-Amp