3,3'-(Terephthaloyldiimino)bis(1-methylpyridinium) di-p-toluenesulfonate 3,3'-(p-Phenylenebis(carbonylimino))bis(1-methylpyridinium) ditosylate 68771-60-8 Pyridinium, 3,3'-(terephthaloyldiimino)bis(1-methyl-, di-p-toluenesulfonate