SMILES: C1=CC=C2C(=C1)C(=CN2)C3=C(NC(=C3C4=CNC5=CC=CC=C54)C(=O)[O-])C(=O)[O-]
Description: The molecule is a dicarboxylic acid dianion obtained by deprotonation of both carboxy groups of chromopyrrolic acid; major microspecies at pH 7.3. It is a conjugate base of a chromopyrrolic acid.