The molecule is heme b in which the iron has oxidation state +2. It has a role as a human metabolite and a cofactor. It is a heme b and a ferroheme. It is a conjugate acid of a ferroheme b(2-).
3-[18-(2-carboxyethyl)-7,12-bis(ethenyl)-3,8,13,17-tetramethylporphyrin-21,23-diid-2-yl]propanoic acid;iron