14101-73-6 NSC103057 Pyridinium, 4,4'-[1,4-phenylenebis(carbonylimino-4,1-phenylene)]bis[1-ethyl-, salt with 4-methylbenzenesulfonic acid (1:2) Pyridinium, 4,4'-[terephthaloylbis(imino-p-phenylene)]bis[1-ethyl-, di-p-toluenesulfonate