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