3-Bromo-2-chloro-6-(trifluoromethoxy)pyridine-4-sulfonyl chloride
3-Bromo-5-chloro-6-(fluoromethyl)-2-(trifluoromethoxy)pyridine
3-Bromo-2-chloro-4-(trifluoromethoxy)pyridine-6-sulfonyl chloride
5-Bromo-3-hydroxy-2-(trifluoromethoxy)pyridine-4-sulfonyl chloride