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