Methyl 3-chloro-6-(difluoromethyl)-2-iodopyridine-5-carboxylate
Methyl 2-chloro-6-(difluoromethyl)-3-iodopyridine-5-carboxylate
Methyl 5-bromo-3-(chloromethyl)-2-(difluoromethyl)pyridine-4-carboxylate
Methyl 2-bromo-5-(chloromethyl)-6-(difluoromethyl)pyridine-3-carboxylate