6-Bromo-3-(bromomethyl)-4-(difluoromethyl)-2-iodopyridine
3-(Aminomethyl)-2-(difluoromethyl)-6-hydroxy-5-(trifluoromethoxy)pyridine
5-Chloro-3-(difluoromethyl)-4-fluoro-2-nitropyridine
3-Amino-6-(difluoromethyl)-2-(trifluoromethoxy)pyridine-5-acetic acid