3-Cyano-5-fluoro-2-(trifluoromethoxy)pyridine-6-carbonyl chloride
4-Cyano-6-hydroxy-3-(trifluoromethoxy)pyridine-2-carbonyl chloride
5-Cyano-4-fluoro-3-(trifluoromethoxy)pyridine-2-carbonyl chloride
4-Cyano-2-hydroxy-3-(trifluoromethoxy)pyridine-6-carbonyl chloride