SMILES: CC1=C(C2=CC3=NC(=CC4=C(C(=C([N-]4)C=C5C(=C(C(=N5)C=C1[N-]2)C)C=C)C)C=C)[C@@]([C@]3(CCC(=O)[O-])O)(C)O)CCC(=O)[O-].[Fe]
Description: The molecule is a dicarboxylic acid dianion resulting from the removal of a proton from both of the carboxy groups of heme d trans-diol. It is a conjugate base of a heme d trans-diol.