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