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