Ethyl 3-chloro-5-(difluoromethyl)-2-fluoropyridine-6-acetate
Methyl 4-bromo-3-(bromomethyl)-2-(difluoromethyl)pyridine-5-acetate
Methyl 4-bromo-2-(bromomethyl)-6-(difluoromethyl)pyridine-3-acetate
Methyl 4-bromo-2-(bromomethyl)-5-(difluoromethyl)pyridine-3-acetate