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