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