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