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