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