The molecule is a ferroheme having a methyl group at ring position 8 and an isoprenoid chain at position 2. It is a heme o and a ferroheme. It is a conjugate acid of a ferroheme o(2-).
3-[18-(2-carboxyethyl)-7-ethenyl-12-[(1S,4E,8E)-1-hydroxy-5,9,13-trimethyltetradeca-4,8,12-trienyl]-3,8,13,17-tetramethylporphyrin-21,23-diid-2-yl]propanoic acid;iron(2+)