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