23617-49-4 81944-23-2 Pyridinium, 3,3'-((2,5-dimethyl-1,4-phenylene)bis(carbonylimino-4,1-phenylenecarbonylimino))bis(1-methyl-, salt with 4-methylbenzenesulfonic acid (1:2) Pyridinium, 3,3'-((2,5-dimethylterephthaloyl)bis(imino-p-phenylenecarbonylimino))bis(1-methyl-, di-p-toluenesulfonate SN 6324