Showing structure for 2,16-dimethyl-15-{1-methyl-8-methylidene-7-oxo-2,6-dioxabicyclo[3.3.1]nonan-4-yl}-8-oxatetracyclo[9.7.0.0³,⁹.0¹²,¹⁶]octadeca-2,4-dien-7-one