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