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