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