2-(Difluoromethyl)-3-iodopyridine-6-sulfonamide
4-(Chloromethyl)-6-(difluoromethyl)-3-(trifluoromethoxy)pyridine-2-sulfonyl chloride
4-(Bromomethyl)-2-cyano-5-(difluoromethyl)pyridine
5-(Chloromethyl)-3-(difluoromethyl)-4-(trifluoromethoxy)pyridine-2-sulfonyl chloride