(E)-1,2-di(pyridin-4-yl)diazene
3-Nitro-4-pyridin-4-ylpyridine
4-Pyridin-4-ylsulfonylpyridine
Pyridine,2-[3-(2-pyridinyl)-1H-1,2,4-triazol-5-yl]-
Acridine, 9-(4-pyridinyl)-
2,5-Di-4-pyridinylpyrazine
4-Pyridinamine, N-methyl-N-4-pyridinyl-