Ethyl 3-chloro-2-cyano-5-(difluoromethyl)pyridine-6-carboxylate
Ethyl 3-(aminomethyl)-2-bromo-4-(difluoromethyl)pyridine-5-acetate
Methyl 5-chloro-2-cyano-3-(difluoromethyl)pyridine-6-acetate
Methyl 4-chloro-5-cyano-2-(difluoromethyl)pyridine-3-acetate