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