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