4-Chloro-2-(difluoromethyl)-6-fluoropyridine-3-sulfonyl chloride
4-Chloro-2-(difluoromethyl)-3-fluoropyridine-5-sulfonyl chloride
3-Chloro-5-(difluoromethyl)-6-fluoropyridine-2-sulfonyl chloride
2-(Bromomethyl)-3-chloro-5-(difluoromethyl)-6-fluoropyridine