Showing structure for 5,13,16,18-tetrahydroxy-4,12-bis(4-hydroxyphenyl)-3,11,21-trioxapentacyclo[11.8.0.0¹,¹⁰.0²,⁷.0¹⁵,²⁰]henicosa-2(7),9,15,17,19-pentaene-8,14-dione