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