2-(Bromomethyl)-3-(difluoromethyl)-4-fluoropyridine-5-carboxylic acid
3-(Aminomethyl)-5-(difluoromethyl)-6-fluoro-2-methylpyridine
4-(Chloromethyl)-5-(difluoromethyl)-3-fluoro-2-methylpyridine
5-(Difluoromethyl)-4-fluoro-3-nitropyridine-2-acetic acid