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