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