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