Showing structure for 3-{1'-[1-(3,4-dimethyl-5-oxo-2h-furan-2-yl)propan-2-yl]-2,7'-dihydroxy-3'a,4,4,7a,7'a-pentamethyl-4'-oxo-decahydro-1'h-1,5'-spirobi[inden]-5-yloxy}-3-oxopropanoic acid