4-Bromo-3-(chloromethyl)-6-(difluoromethyl)pyridine-2-acetic acid
4-Bromo-3-(chloromethyl)-5-(difluoromethyl)pyridine-2-acetic acid
4-Bromo-3-(chloromethyl)-2-(difluoromethyl)pyridine-5-acetic acid
4-Bromo-2-(difluoromethyl)-3-nitropyridine-5-acetonitrile