Methyl 4-amino-3-(bromomethyl)-2-(difluoromethyl)pyridine-5-carboxylate
3-Amino-6-(aminomethyl)-2-(difluoromethyl)pyridine-4-methanol
Methyl 2-amino-3-(bromomethyl)-5-(difluoromethyl)pyridine-6-acetate
3-Amino-5-(aminomethyl)-4-(difluoromethyl)pyridine-2-methanol