Showing structure for 9-hydroxy-3,4,5,19-tetramethoxy-9,10-dimethyl-8-(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 acetate