2-(Difluoromethyl)-3-fluoro-5-hydroxypyridine-4-sulfonyl chloride
3-Fluoro-6-methyl-4-(trifluoromethoxy)pyridine-2-sulfonyl chloride
3-Chloromethyl-4-hydroxy-5-methylpyridine
6-Methoxy-2-(trifluoromethoxy)pyridine-3-sulfonyl chloride
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