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