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