The molecule is a cyclic tetrapyrrole anion arising from deprotonation of the four carboxy groups of ferroheme d1; major species at pH 7.3. It is a cyclic tetrapyrrole anion and a tetracarboxylic acid anion. It is a conjugate base of a ferroheme d1.
3-[(8R,13R)-18-[(E)-2-carboxylatoethenyl]-8,13-bis(carboxylatomethyl)-3,8,13,17-tetramethyl-7,12-dioxoporphyrin-21,24-diid-2-yl]propanoate;iron