Ethyl 2-cyano-3-(difluoromethyl)-5-hydroxypyridine-4-carboxylate
6-(Aminomethyl)-2-chloro-3-(difluoromethyl)pyridine-4-carboxaldehyde
5-Cyano-3-(difluoromethyl)-4-fluoropyridine-2-carboxylic acid
4-Cyano-2-(difluoromethyl)-3-iodopyridine-5-acetonitrile