Showing structure for (3as,6s,6as,7s,8s,9ar,9br)-7-hydroxy-6,9a-dimethyl-3-methylidene-2,9-dioxo-octahydroazuleno[4,5-b]furan-8-yl 2-[(3as,5r,8r,8ar)-8-hydroxy-3a,8-dimethyl-octahydroazulen-5-yl]prop-2-enoate