50308-94-6 Cain's quinolinium NSC 176319 NSC176319 Quinolinium, 6-amino-1-methyl-4-[[4-[[[-[(1-methylpyridinium-4-yl)amino]phenyl]carbonyl]phenyl]amino]-, dibromide Quinolinium, 6-amino-1-methyl-4-[[[[[(1-methylpyridinium-4-amino)phenyl]amino]carbonyl]phenyl]amino]-, dibromide