Ethyl 3-bromo-4-(difluoromethyl)-2-nitropyridine-5-acetate
Methyl 6-bromo-4-(chloromethyl)-2-(difluoromethyl)pyridine-3-acetate
Methyl 6-bromo-4-(chloromethyl)-3-(difluoromethyl)pyridine-2-acetate
Ethyl 3-bromo-2-(difluoromethyl)-6-nitropyridine-4-acetate