5-Cyano-3-(difluoromethyl)-4-fluoropyridine-2-carboxylic acid
4-Cyano-2-(difluoromethyl)-3-iodopyridine-5-acetonitrile
3-(Aminomethyl)-6-chloro-2-(difluoromethyl)pyridine-4-carboxylic acid
4-(Aminomethyl)-6-chloro-2-(difluoromethyl)pyridine-3-carboxylic acid