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