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