Showing structure for (1s,2s,3r,5s,6r,8s,11s,14r,17s,20r)-3-hydroxy-6,14-dimethyl-10,16,18-trioxahexacyclo[12.5.1.1⁵,⁸.0¹,¹¹.0²,⁸.0¹⁷,²⁰]henicosane-7,9-dione