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