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