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