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