title: A study of the reduced species of cobalt and nickel complexes analogous to vitamin B 12 .
mesh_terms: D003035:Cobalt; D004578:Electron Spin Resonance Spectroscopy; D009532:Nickel; D010084:Oxidation-Reduction; D014805:Vitamin B 12
chemical_list: D003035:Cobalt; D009532:Nickel; D014805:Vitamin B 12