Showing structure for (3ar,4r,8s,9r,9bs)-8,9-dihydroxy-6-(hydroxymethyl)-9-methyl-3-methylidene-2-oxo-3ah,4h,5h,7h,8h,9ah,9bh-azuleno[4,5-b]furan-4-yl (2z)-2-methylbut-2-enoate