SMILES: C1=C(C=C(C2=C1C(=O)C(=O)C(=C2O)C3=C(C4=C(C=C(C=C4O)O)C(=O)C3=O)O)O)O
Description: The molecule is a ring assembly compound consisting of two flaviolin units joined by a 3,3'-linkage. It derives from a flaviolin. It is a conjugate acid of a 3,3'-biflaviolin 2,2'-diolate.