40603-58-5 71957-32-9 Mesotetra(4-N-methylpyridyl)porphine Zn Tetra(4-N-methylpyridyl)porphine zinc Zinc tetra(4-N-methylpyridyl)porphine Zinc(4+), ((4,4',4'',4'''-(21H,23H-porphine-5,10,15,20-tetrayl)tetrakis(1-methylpyridiniumato))(2-)-N21,N22,N23,N24)-, (SP-4-1)- Zinc(II) tetrakis(4-N-methylpyridyl)porphine Zn-Tmpyp Znt4MPyP