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