Imidazo[1,2-a]pyridinium, 2,2'-[(1,4-piperazinediyl)bis(iminomethyl-4,1-phenylene)]bis[1-methyl-, salt with 4-methylbenzenesulfonic acid (1:2) Imidazo[1,2-a]pyridinium, 2,2'-[1,4-piperazinediylbis(nitrilomethylidyne-4,1-phenylene)]bis[1-methyl-, salt with 4-methylbenzenesulfonic acid (1:2) NSC370656