20719-29-3 NSC125030 Pyrimidinium, 4,4'-[1,4-phenylenebis(carbonylimino-4,1-phenylene-imino)]bis[2-amino-1-ethyl-, salt with 4-methylbenzenesulfonic acid (1:2) Pyrimidinium, 4,4'-[terephthaloylbis(imino-p-phenyleneimino)]bis-(2-amino-1-ethyl-, di-p-toluenesulfonate, hemihydrate Pyrimidinium, 4,4'-[terephthaloylbis(imino-p-phenyleneimino)]bis[2-amino-1-ethyl-, di-p-toluenesulfonate