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@H](CCCC(C)CCCC(C)CCCC(C)C)O)C)C(=C3CCC(=O)[O-])C=O)CCC(=O)[O-].[Fe+3]
Description: The molecule is a dicarboxylic acid anion obtained by deprotonation of the carboxy groups of ferriheme a3. Major structure at pH 7.3. It is a conjugate base of a ferriheme a3.