3-(Chloromethyl)-2-(difluoromethyl)-4-hydroxypyridine-5-carboxylic acid
3-Amino-2-cyano-6-(difluoromethyl)pyridine-5-carboxylic acid
4-(Aminomethyl)-3-chloro-2-(difluoromethyl)pyridine
3-(Bromomethyl)-6-cyano-4-(trifluoromethoxy)pyridine-2-acetic acid