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