Showing structure for [(1r,4ar,5s,6r,8s,8ar)-1,8-dihydroxy-8a-(hydroxymethyl)-5,6-dimethyl-5-[2-(5-oxo-2h-furan-3-yl)ethyl]-hexahydro-2h-naphthalen-1-yl]methyl 2-methylbut-2-enoate