2-Cyano-6-methyl-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride
4-Hydroxy-2-iodopyridine-6-sulfonyl chloride
3-Bromo-5-(chloromethyl)-2-(difluoromethyl)pyridine-6-methanol
3-Fluoro-2-iodo-4-(methylthio)pyridine
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