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