Showing structure for (3s,3ar,4s,6s,6as,9as,9bs)-6-hydroxy-3,6,9-trimethyl-3-[(2-methylbut-2-enoyl)oxy]-2-oxo-3ah,4h,5h,6ah,7h,9ah,9bh-azuleno[4,5-b]furan-4-yl 2-methylbut-2-enoate