20814-50-0 NSC125027 Pyrimidinium, 4,4'-[1,4-phenylenebis(carbonylimino-4,1-phenyleneimino)]bis[2-amino-1-methyl-, salt with 4-methylbenzenesulfonic acid (1:2) (MF1) Pyrimidinium, 4,4'-[terephthaloylbis(imino-p-phenyleneimino)]bis[2-amino-1-methyl-, di-p-toluenesulfonate