IUPAC:19,20-dimethoxy-13,14-dimethyl-18-oxo-3,6,8-trioxapentacyclo[9.9.1.0^{1,16}.0^{4,21}.0^{5,9}]henicosa-4,9,11(21),16,19-pentaen-12-yl 2-methylbut-2-enoate
IUPAC:19,20-dimethoxy-13,14-dimethyl-18-oxo-3,6,8-trioxapentacyclo[9.9.1.0^{1,16}.0^{4,21}.0^{5,9}]henicosa-4,9,11(21),16,19-pentaen-12-yl 2-methylbut-2-enoate