Showing structure for (3e,3as,4s,8bs)-4-hydroxy-8,8-dimethyl-3-({[(2r)-4-methyl-5-oxo-2h-furan-2-yl]oxy}methylidene)-3ah,4h,5h,6h,8bh-indeno[1,2-b]furan-2,7-dione