SMILES: CC1=C2[C@@]([C@@H](C(=N2)C=C3[C@@]([C@@H](C(=CC4=NC(=CC5=C(C(=C1[N-]5)CC(=O)[O-])CCC(=O)[O-])C(=C4CC(=O)[O-])CCC(=O)[O-])[N-]3)CCC(=O)[O-])(C)CC(=O)[O-])CCC(=O)[O-])(C)CC(=O)[O-].[Co]
Description: The molecule is a precorrin carboxylic acid anion obtained by deprotonation of the carboxy groups of cobalt(II)-factor III; major species at pH 7.3. It is a conjugate base of a cobalt(II)-factor III.