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