Showing structure for {1,3,14,19-tetrahydroxy-7,18-dimethyl-5,12-dioxo-8,17-dioxapentacyclo[14.2.2.0²,¹⁵.0⁴,¹³.0⁶,¹¹]icosa-2(15),3,6(11),13-tetraen-9-yl}acetic acid