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