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