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