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