Showing structure for 6,11,14-trihydroxy-5,17,18-trimethoxy-7,7-dimethyl-2,8,21-trioxapentacyclo[12.8.0.0³,¹².0⁴,⁹.0¹⁵,²⁰]docosa-3,9,11,15(20),16,18-hexaen-13-one