(2R,3R,7bR,9aS,12R,13bS,15aR,16R)-2,3-Dihydroxy-7b,9a,12,13b,15a,16-hexamethylicosahydro-3,5a-methanochryseno[2,1-c]oxepine-12-carboxylic acid AIDS-060360 AIDS060360