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