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