Showing structure for (8s,9r,10r)-3,9-dihydroxy-4,5,19-trimethoxy-9,10-dimethyl-15,17-dioxatetracyclo[10.7.0.0²,⁷.0¹⁴,¹⁸]nonadeca-1(12),2,4,6,13,18-hexaen-8-yl (2z)-2-methylbut-2-enoate