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