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