Imidazo[1,2-a]pyridinium, 2,2'-[(2,4-pyrimidinediyl)bis(hydrazonomethyl-4,1-phenylene)]bis[1-methyl-, dibromide Imidazo[1,2-a]pyridinium, 2,2'-[2,4-pyrimidinediylbis(2-hydrazinyl-1-ylidenemethylidyne-4,1-phenylene)]bis[1-methyl-, dibromide NSC375166