Showing structure for 4,12-bis[(2e)-but-2-en-2-yl]-5,13-dichloro-14-hydroxy-6-methoxy-7,15-dimethyl-2,9-dioxatricyclo[9.4.0.0³,⁸]pentadeca-1(15),3(8),4,6,11,13-hexaen-10-one