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