Showing structure for (3ar,4r,6as,8s,9s,9ar,9br)-8-(acetyloxy)-9-methyl-3,6-dimethylidene-2-oxo-octahydro-3ah-azuleno[4,5-b]furan-4-yl (2e)-2-({[(2e)-2-[(acetyloxy)methyl]but-2-enoyl]oxy}methyl)-4-hydroxybut-2-enoate