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