Ethyl 4-chloro-3-cyano-2-(difluoromethyl)pyridine-6-acetate
Ethyl 4-bromo-3-(chloromethyl)-5-(difluoromethyl)pyridine-2-carboxylate
6-Chloro-3-cyano-2-(difluoromethyl)pyridine-4-sulfonamide
Ethyl 5-bromo-4-(chloromethyl)-2-(difluoromethyl)pyridine-3-carboxylate