SMILES: CC1=C(C(=NC1C=C)/C=C\\2/C(=C(/C(=C/C3=C(C(=C(N3)/C=C\\4/C(=C(C=N4)C=C)C)C)CCC(=O)O)/N2)CCC(=O)O)C)C=C
Description: The molecule is a linear tetrapyrrole obtained by degradation of heme by an enzyme isolated from Escherichia coli O157:H7. It is a linear tetrapyrrole and a dicarboxylic acid. It is a tautomer of an anaerobilin dizwitterion.