NSC218440 Quinolinium, 1-methyl-4-[[4-[[[4-[(1-methylpyridinium-4-yl)amino]phenyl]amino]carbonyl]-3-nitrophenyl]amino]-6-nitro-, bis(methyl sulfate) Quinolinium, 1-methyl-4-[[4-[[[4-[(1-methylpyridinium-4-yl)amino]phenyl]amino]carbonyl]-3-nitrophenyl]amino]-6-nitro-, dimethanesulfonate