Showing structure for 5-{2-[6-hydroxy-5-(hydroxymethyl)-5,8a-dimethyl-2-methylidene-hexahydro-1h-naphthalen-1-yl]-1-(2-oxo-5h-furan-3-yl)ethyl}-3-{2-[6-hydroxy-5-(hydroxymethyl)-5,8a-dimethyl-2-methylidene-hexahydro-1h-naphthalen-1-yl]ethenyl}-5h-furan-2-one