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