8H-2,10c-Epoxy-7,9-methano-3a,10b-propanocyclopenta[h]pyrano[4,3,2-de]-1,3-benzodioxin-10-acetic acid, 7,7a,12-tris(acetyloxy)-15-[[[(2R,3R)-2,3-dimethyloxiranyl]carbonyl]oxy]-14-(3-furanylcarbonyl)octahydro-2,9,10a,14-tetramethyl-5-oxo-, methyl ester, (3aS,6aR,7S,7aS,9R,10R,10aS,10bR,10cS,12R,14R,1...