Showing structure for (1r,3s,3as,5r,6ar,7s,8s,10r,10ar)-1,3-bis(acetyloxy)-10-hydroxy-7,8-dimethyl-7-[(2e)-3-methylpenta-2,4-dien-1-yl]-decahydronaphtho[1,8a-c]furan-5-yl (2e)-2-methylbut-2-enoate