Showing structure for 5-hydroxy-13-methoxy-6,11-dimethyl-2,8,16,19-tetraoxapentacyclo[12.4.2.0⁴,¹⁸.0⁷,¹⁷.0¹⁰,¹⁵]icosa-4,6,10,12,14,17-hexaene-3,9-dione