Ethyl 6-amino-4-(aminomethyl)-3-(difluoromethyl)pyridine-2-carboxylate
Methyl 3-amino-6-(aminomethyl)-4-(difluoromethyl)pyridine-2-carboxylate
Methyl 4-amino-6-(aminomethyl)-3-(difluoromethyl)pyridine-2-carboxylate
4-Bromo-2-(bromomethyl)-6-chloro-3-(difluoromethyl)pyridine