2-Fluoro-5-hydroxy-4-(trifluoromethoxy)pyridine-3-sulfonyl chloride
3-Fluoro-5-methyl-6-(trifluoromethoxy)pyridine-2-sulfonyl chloride
3-Fluoro-6-hydroxy-4-(trifluoromethoxy)pyridine-2-methanol
6-Fluoro-4-hydroxy-2-(trifluoromethoxy)pyridine-3-sulfonyl chloride