Synonyms: Porphine,5,10,15,20-tetra-4-pyridyl- (6CI,8CI);Porphine, a,b,g,d-tetra-4-pyridyl- (7CI);5,10,15,20-Tetra(4-pyridyl)-21H,23H-porphine;5,10,15,20-Tetra(4-pyridyl)porphine;5,10,15,20-Tetra(4-pyridyl)porphyrin;5,10,15,20-Tetrakis(4-pyridinyl)-21H,23H-porphine;5,10,15,20-Tetrakis(4-pyridyl)-21H,23H-porphine;5,10,15,20-Tetrakis(4-pyridyl)-21H,23H-porphyrin;5,10,15,20-Tetrakis(4-pyridyl)porphyrin;5,10,15,20-Tetrakis(4'-N-pyridyl)porphyrin;Mesotetra(4-pyridyl)porphyrin;Tetra(4-pyridyl)porphine;Tetra(4-pyridyl)porphyrin;Tetrakis(4-pyridyl)porphine;Tetrakis(4-pyridyl)porphyrin;meso-Tetra(4-pyridyl)porphine;meso-Tetra(4-pyridyl)porphyrin;meso-Tetrakis(4-pyridyl)porphine;meso-Tetrakis(4-pyridyl)porphyrin;a,b,g,d-Tetra-4-pyridylporphine;a,b,g,d-Tetrakis(4-pyridyl)porphine;