Showing structure for methyl 6-{4,4,8,12,17,17,20-heptamethyl-5,10-dioxo-16,18-dioxapentacyclo[10.6.2.0³,⁸.0⁹,¹⁹.0¹⁵,²⁰]icos-9(19)-en-13-yl}-2-methyl-4-oxoheptanoate