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