2-Bromo-3-nitro-5-(trifluoromethoxy)pyridine-4-sulfonyl chloride
3-Bromo-5-methyl-6-(trifluoromethoxy)pyridine-2-sulfonyl chloride
3-Bromo-6-nitro-2-(trifluoromethoxy)pyridine-5-sulfonamide
3-Bromo-5-methyl-2-(trifluoromethoxy)pyridine-6-sulfonyl chloride