SMILES: CC1=C(C2=CC3=C(C(=C(N3)C=C4C(=C(C(=N4)C=C5C(=C(C(=N5)C=C1N2)C)CCC(=O)[O-])C)CCC(=O)[O-])C)CCC(=O)[O-])CCC(=O)[O-]
Description: The molecule is a cyclic tetrapyrrole anion obtained by deprotonation of the four carboxy groups of coproporphyrin III; major species at pH 7.3. It is a conjugate base of a coproporphyrin III.