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