Showing structure for 9,17,19,21-tetrahydroxy-5,13-bis(3,4,5-trihydroxyphenyl)-4,12,14-trioxapentacyclo[11.7.1.0²,¹¹.0³,⁸.0¹⁵,²⁰]henicosa-2,8,10,15,17,19-hexaen-6-yl 3,4,5-trihydroxybenzoate