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