SMILES: CC1=C(C2=CC3=C(C(=C([N-]3)C=C4[C@@](C(=O)C(=N4)C=C5[C@@](C(=O)C(=N5)C=C1[N-]2)(C)CC(=O)[O-])(C)CC(=O)[O-])C)/C=C/C(=O)[O-])CCC(=O)[O-].[Fe]
Description: 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.