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