Showing structure for (8r,9r,10r,11r)-3,4,5,19-tetramethoxy-9,10-dimethyl-8-[(2e)-2-methylbut-2-enoyl]-15,17-dioxatetracyclo[10.7.0.0²,⁷.0¹⁴,¹⁸]nonadeca-1(12),2,4,6,13,18-hexaen-11-yl propanoate