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