4-Cyano-5-(difluoromethyl)-2-methoxypyridine-3-carboxylic acid
4-(Aminomethyl)-3-chloro-2-(difluoromethyl)pyridine-5-carboxylic acid
5-(Aminomethyl)-4-chloro-2-(difluoromethyl)-3-(trifluoromethyl)pyridine
6-(Difluoromethyl)-4-iodo-2-(trifluoromethoxy)-3-(trifluoromethyl)pyridine