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