Methyl 5-bromo-3-(chloromethyl)-2-(difluoromethyl)pyridine-4-carboxylate
Methyl 2-bromo-5-(chloromethyl)-6-(difluoromethyl)pyridine-3-carboxylate
2-Chloro-6-(difluoromethyl)-3-iodopyridine-4-acetic acid
2-Chloro-5-(difluoromethyl)-3-iodopyridine-4-acetic acid