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