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