AIDS-028278 AIDS028278 Cyanthiwigin U Cyclohept[e]inden-3(3aH)-one, 4,5,5a,8,9,10,10a,10b-octahydro-8-hydroxy-3a,5a,8-trimethyl-1-(1-methylethyl)-, (3aS,5aS,8S,10aR,10bS)-