2-(Bromomethyl)-4-(difluoromethyl)-3-(trifluoromethoxy)pyridine-5-sulfonyl chloride
4-(Difluoromethyl)-3-fluoropyridine-2-sulfonyl chloride
5-Chloro-4-mercaptonicotinonitrile
4-Cyano-2-fluoro-3-methyl-6-(trifluoromethoxy)pyridine
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