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