4-Fluoro-2-hydroxy-3-(trifluoromethoxy)pyridine-5-carbonyl chloride
3-Fluoro-5-hydroxy-6-(trifluoromethoxy)pyridine-2-carbonyl chloride
3-Fluoro-5-hydroxy-4-(trifluoromethoxy)pyridine-2-carbonyl chloride
3-Fluoro-5-hydroxy-2-(trifluoromethoxy)pyridine-4-carbonyl chloride