Showing structure for (3as,4r,5r,9r,9as,9bs)-5-(acetyloxy)-9-hydroxy-6,9-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,9ah,9bh-azuleno[4,5-b]furan-4-yl (2r,3r)-2,3-dimethyloxirane-2-carboxylate