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