18355-51-6 7,7'-(4,4'-Biphenylylenebis(carbonylimino))bis(1-ethylquinolinium)di-p-toluenesulfonate 7,7'-(p,p'-Biphenylylenebis(carbonylimino))bis(2-ethylquinolinium) ditosylate Quinolinium, 7,7'-(4,4'-biphenylylenebis(carbonylimino))bis(1-ethyl-, di-p-toluenesulfonate