16aH-1,6:2,6-Diepoxybenz(7,8)oxireno(5,6)azuleno(8,1-bc)oxacyclotridecin-16,16a,17-triol, 3-(acetyloxy)eicosahydro-17a-(hydroxymethyl)-4,14,15-trimethyl-2-(1-methylethenyl)-, 16-benzoate, (1R,2R,3R,4R,4aR,6S,7R,14R,14aS,15S,16S,16aS,16bR,17S,17aR,18aS,18bS)- 78518-72-6