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