Ethyl 3-(bromomethyl)-2-(difluoromethyl)-5-iodopyridine-4-acetate
Methyl 3-(aminomethyl)-2-(difluoromethyl)-6-iodopyridine-4-acetate
Ethyl 6-(bromomethyl)-2-(difluoromethyl)-3-iodopyridine-4-acetate
Methyl 2-(aminomethyl)-6-(difluoromethyl)-3-iodopyridine-5-acetate