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