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