Ethyl 6-(aminomethyl)-3-bromo-2-(difluoromethyl)pyridine-4-carboxylate
Ethyl 5-bromo-2-(difluoromethyl)-3-iodopyridine-6-acetate
Ethyl 2-(aminomethyl)-5-bromo-4-(difluoromethyl)pyridine-3-carboxylate
Ethyl 4-bromo-5-(difluoromethyl)-2-iodopyridine-3-acetate