2-Amino-4-(chloromethyl)-3-(difluoromethyl)pyridine-5-carboxylic acid
2-Amino-3-(chloromethyl)-5-(difluoromethyl)pyridine-6-carboxylic acid
3-Amino-4-(chloromethyl)-5-(difluoromethyl)pyridine-2-carboxylic acid
3-Amino-2-(difluoromethyl)-6-(trifluoromethyl)pyridine-4-acetonitrile