4-Bromo-3-nitro-6-(trifluoromethoxy)pyridine-2-sulfonamide
3-Bromo-4-methyl-6-(trifluoromethoxy)pyridine-2-sulfonyl chloride
3-Bromo-4-methyl-2-(trifluoromethoxy)pyridine-6-sulfonyl chloride
3-Bromo-2-methyl-6-(trifluoromethoxy)pyridine-4-sulfonyl chloride