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