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