Tetra(4-pyridyl)porphyrin16834-13-2100 % similar Tetraphenylporphyrin917-23-770 % similar 5,10,15,20-Tetrakis(4-aminophenyl)porphyrin22112-84-164 % similar Tetrasodium meso-tetra(4-sulfonatophenyl)porphine39050-26-551 % similar Mthpc122341-38-244 % similar 4,4′-(1H-1,2,4-Triazole-3,5-diyl)bis[pyridine]4329-78-639 % similar 4,4'-Bipyridine553-26-437 % similar 1,4-Bis(pyrid-4-yl)benzene113682-56-736 % similar trans-1,2-Bis(4-pyridyl)ethylene13362-78-233 % similar 4-Phenylpyridine939-23-132 % similar 2-(4-Pyridinyl)benzaldehyde176526-00-431 % similar Pyridine-4-carbaldehyde872-85-530 % similar 5-(4-Pyridyl)-1,3,4-oxadiazole-2-thiol15264-63-830 % similar