3-Bromo-6-cyano-4-hydroxy-2-(trifluoromethoxy)pyridine
4-Bromo-5-cyano-2-hydroxy-3-(trifluoromethoxy)pyridine
4-Bromo-5-cyano-3-hydroxy-2-(trifluoromethoxy)pyridine
4-Bromo-3-cyano-2-hydroxy-6-(trifluoromethoxy)pyridine
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