Showing structure for methyl 2-(2-{[6-(furan-3-yl)-7-methyl-11-methylidene-4-oxo-2,5-dioxatricyclo[5.4.0.0?,?]undecan-10-yl]methyl}-2,6,6-trimethyl-5-oxocyclohex-3-en-1-yl)acetate