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