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