4-(Bromomethyl)-2-cyano-5-(difluoromethyl)pyridine
5-(Chloromethyl)-3-(difluoromethyl)-4-(trifluoromethoxy)pyridine-2-sulfonyl chloride
3-(Bromomethyl)-5-cyano-4-(difluoromethyl)pyridine
4-(Difluoromethyl)-5-iodopyridine-2-sulfonyl chloride
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