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