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