Showing structure for (3as,4r,5r,6s,6ar,9r,9as,9bs)-5-(acetyloxy)-9-hydroperoxy-6-hydroxy-6,9-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,6ah,9ah,9bh-azuleno[4,5-b]furan-4-yl (2z)-2-methylbut-2-enoate