SMILES: C1=C(C=C(C2=C1C(=O)C(=O)C(=C2[O-])C3=C(C4=C(C=C(C=C4[O-])O)C(=O)C3=O)[O-])O)O
Description: The molecule is a flavonoid oxoanion that is a trianionic form of 3,3'-biflaviolin. It is the major microspecies at pH 7.3 (according to Marvin v 6.2.0.). It is a conjugate base of a 3,3'-biflaviolin 2,2'-diolate.