Ethyl 2-amino-5-(bromomethyl)-3-(difluoromethyl)pyridine-4-carboxylate
Methyl 3-amino-2-(chloromethyl)-4-(difluoromethyl)pyridine-5-acetate
Ethyl 6-amino-4-(bromomethyl)-3-(difluoromethyl)pyridine-2-carboxylate
3-Amino-2-(bromomethyl)-6-(difluoromethyl)pyridine-4-acetic acid