SMILES: C/C=C/1\\[C@H](C(=O)N=C1/C=C\\2/C(=C(/C(=C/C3=C(C(=C(N3)C[C@@H]4C(=C(C(=O)N4)C=C)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)-phycoerythrobilin; 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)-phycoerythrobilin.