AIDS-220182 AIDS220182 Propanedioic acid, (4aS,6S,6aS,8R,9S,11aS,11bS)-6-(acetyloxy)tetradecahydro-4,4,9,11b-tetramethyl-9,11a-methano-11aH-cyclohepta[a]naphthalen-8-yl methyl ester