Methyl 3-bromo-4-(chloromethyl)-6-(trifluoromethoxy)pyridine-2-carboxylate
2-(Bromomethyl)-4-(difluoromethyl)-3-(trifluoromethoxy)pyridine-5-sulfonyl chloride
4-(Difluoromethyl)-3-fluoropyridine-2-sulfonyl chloride
5-Chloro-4-mercaptonicotinonitrile
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