Showing structure for (9r)-5,14-dihydroxy-9-(2-hydroxypropan-2-yl)-16-methoxy-15-(3-methylbut-2-en-1-yl)-8,19-dioxatetracyclo[9.8.0.0²,⁷.0¹³,¹⁸]nonadeca-1(11),2,4,6,13,15,17-heptaen-12-one