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