1 SN8 1,6-dimethyl-4-(4-(4-(1-methylpyridinium-4-ylamino)phenylcarbamoyl)phenylamino)quinolinium 1.000 2 SN6 1-methyl-4-[4-[4-(4-(1-methylquinolinium)amino)benzamido]anilino]pyridinium 0.972 3 SN7 4-[4-[2-amino-4-[4,6-(N-methylquinolinium)amino]benzamido]anilino]-N-methylpyridinium mesylate 0.921 4 SN9 8-methoxy-1-methyl-4-(4-(4-(1-methylpyridinium-4-ylamino)phenylcarbamoyl)phenylamino)quinolinium 0.921