Showing structure for 9,19-dimethoxy-18-methyl-5,13-diphenyl-4,12,14-trioxapentacyclo[11.7.1.0²,¹¹.0³,⁸.0¹⁵,²⁰]henicosa-2(11),3(8),9,15(20),16,18-hexaene-17,21-diol