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