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