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