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