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