Showing structure for (1s,12r,13r,14r)-19,20-dimethoxy-13,14-dimethyl-18-oxo-3,6,8-trioxapentacyclo[9.9.1.0¹,¹⁶.0⁴,²¹.0⁵,⁹]henicosa-4(21),5(9),10,16,19-pentaen-12-yl (2z)-2-methylbut-2-enoate