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