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