The molecule is a heme. It has a role as an Escherichia coli metabolite and a cofactor. It is a conjugate acid of a siroheme(8-).
iron;3-[(2S,3S,17S,18S)-8,12,17-tris(2-carboxyethyl)-3,7,13,18-tetrakis(carboxymethyl)-3,18-dimethyl-2,17-dihydroporphyrin-21,23-diid-2-yl]propanoic acid