SMILES: CCC1=C(C(=NC1=O)/C=C\\2/C(=C(/C(=C/C3=C(C(=C(N3)/C=C\\4/C(=C/C)/[C@H](C(=O)N4)C)C)CCC(=O)[O-])/N2)CCC(=O)[O-])C)C
Description: The molecule is a dicarboxylic acid dianion obtained by deprotonation of the carboxy groups of (3E)-phycocyanobilin; major species at pH 7.3. It is a dicarboxylic acid dianion and a linear tetrapyrrole anion. It is a conjugate base of a (3E)-phycocyanobilin.