5-Bromo-2-cyano-4-(trifluoromethoxy)pyridine-3-carbonyl chloride
4-Bromo-5-cyano-2-(trifluoromethoxy)pyridine-3-carbonyl chloride
4-Bromo-5-cyano-3-(trifluoromethoxy)pyridine-2-carbonyl chloride
2-Bromo-4-cyano-3-(trifluoromethoxy)pyridine-5-carbonyl chloride