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