4-Bromo-2-hydroxy-6-(trifluoromethoxy)pyridine-3-carbonyl chloride
4-Bromo-2-hydroxy-5-(trifluoromethoxy)pyridine-3-carbonyl chloride
4-Bromo-2-hydroxy-3-(trifluoromethoxy)pyridine-5-carbonyl chloride
3-Bromo-4-iodo-2-(trifluoromethoxy)pyridine-6-carbonyl chloride