Showing structure for 3,11-bis(3,4-dihydroxyphenyl)-4,12-dioxapentacyclo[8.6.1.1²,⁵.0¹³,¹⁷.0⁹,¹⁸]octadeca-1(16),5(18),6,8,13(17),14-hexaene-7,15-diol