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