51329-41-0 Cobalt(5+), ((4,4',4'',4'''-(21H,23H-porphine-5,10,15,20-tetrayl)tetrakis(1-methylpyridiniumato))(2-)-N21,N22,N23,N24)-, (SP-4-1)- Cot4MPyP Tetrakis(N-methyl-4-pyridinium)porphine cobalt(III) complex meso-Tetrakis(N-methyl-4-pyridiniumyl)porphine Co(III) complex