SMILES: C1=C(C=C(C2=C1C(=O)C(=O)C(=C2[O-])C3=C(C4=C(C=C(C=C4O)O)C(=O)C3=O)[O-])O)O
Description: The molecule is dianion of 3,3'-biflaviolin arising from selective deprotonation of the OH groups at the 2- and 2'-positions. It is a conjugate base of a 3,3'-biflaviolin. It is a conjugate acid of a 3,3'-biflaviolin(3-).