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