Showing structure for (1r,3r,4r,4as,7s,8s,8as)-7,8-dihydroxy-3,4,8,8a-tetramethyl-4-[2-(5-oxo-2h-furan-3-yl)ethyl]-hexahydro-1h-naphthalen-1-yl (2e)-2-methylbut-2-enoate