SMILES: CC1=C2CC3=C(C(=C(N3)CC4=C(C(=C(N4)CC5=C(C(=C(N5)CC(=C1CCC(=O)[O-])N2)C)CCC(=O)[O-])C)CCC(=O)[O-])C)CCC(=O)[O-]
Description: The molecule is the cyclic tetrapyrrole anion formed by loss of a proton from each of the four carboxy groups of coproporphyrinogen I. It is a conjugate base of a coproporphyrinogen I.