Synonyms: AC1L9HVO;Nickel(II) tetrakis(4-N-methylpyridyl)porphine;AC1L568W;nickel(2+); 5,10,15,20-tetrakis(1-methylpyridin-1-ium-4-yl)porphyrin-22,24-diide;(SP-4-1)-((4,4',4'',4'''-(21H,23H-Porphine-5,10,15,20-tetrayl)tetrakis(1-methylpyridiniumato))(2-)-N21,N22,N23,N24)nickel(4+);48242-71-3;nickel(2+); 5,10,15-tris(1-methylpyridin-1-ium-4-yl)-20-(1-methylpyridin-4-ylidene)porphyrin-22-ide;Nickel(4+), ((4,4',4'',4'''-(21H,23H-porphine-5,10,15,20-tetrayl)tetrakis(1-methylpyridiniumato))(2-)-N21,N22,N23,N24)-, (SP-4-1)-