2-Chloro-3-(difluoromethyl)pyridine-4-sulfonyl chloride
2-Hydroxy-5-(trifluoromethoxy)pyridine-3-sulfonyl chloride
5-Chloro-2-nitronicotinonitrile
2-(Chloromethyl)-5-(difluoromethyl)-6-hydroxy-3-methylpyridine
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