18519-65-8 6,6'-(Pyridin-2,5-diylbis(carbonylimino))bis(1-methylquinolinium) ditosylate Quinolinium, 6,6'-(2,5-pyridinediylbis(carbonylimino))bis(1-methyl-, di-p-toluenesulfonate Quinolinium, 6,6'-pyridin-2,5-diylbis(carbonylimino))bis(1-methyl-, ditosylate