1,1,2-Trimethyl-3-(4-sulfonatobutyl)-1H-benzo[e]indol-3-ium
4,4'-Bipyridinium, 1,1''-[1,4-phenylenebis(methylene)]bis-, dibromide
1,1'-Bis(4-bromophenyl)-[4,4'-bipyridine]-1,1'-diiumchloride
1,1'-Bis(4-iodophenyl)-[4,4'-bipyridine]-1,1'-diiumchloride
3,3',3",3"'-(5,10,15,20-Porphyrintetrayl)tetrakis(1-methylpyrid inium) tetrachloride
4-(1H-Benzo[d][1,2,3]triazol-1-yl)-1-methylpyridin-1-ium iodide