AIDS-155562 AIDS155562 [(3R,4S,6S,6aR,8R,9S,11aS,11bS)-3,6-Dihydroxy-4,11b-dimethyldodecahydrospiro[6a,9-methanocyclohepta[a]naphthalene-8,2'-oxiran]-4-yl]methyl acetate