The molecule is a ferriheme consisting of a tetraporphyrin derivative coordinated to a central iron. It is a ferriheme and a heme a. It is a conjugate acid of a ferriheme a3(1-).
3-[18-(2-carboxyethyl)-7-ethenyl-17-formyl-12-[(1S)-1-hydroxy-5,9,13-trimethyltetradecyl]-3,8,13-trimethylporphyrin-21,23-diid-2-yl]propanoic acid;iron(3+)