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