4,4'-Diamino-[1,1'-biphenyl]-3,3'-disulfonic acid

1,4-Butanediphosphonicacid

3-(1H-Pyrazol-3-yl)pyridine

1,4-Di([2,2':6',2''-terpyridin]-4'-yl)benzene

2,7-Di(pyridin-4-yl)benzo[lmn][3,8]phenanthroline-1,3,6,8(2H,7H)-tetraone

1,1,2,2-Tetrakis(4-(pyridin-4-yl)phenyl)ethene

1,1,2,2-Tetrakis(4-(1H-imidazol-1-yl)phenyl)ethene

4,4'-((2,2-Bis((pyridin-4-yloxy)methyl)propane-1,3-diyl)bis(oxy))dipyridine

3,6-Di(pyridin-3-yl)-1,2,4,5-tetrazine

2,6-Di(pyridin-4-yl)naphthalene