5-Cyano-4-(difluoromethyl)-3-(trifluoromethyl)pyridine-2-carboxylic acid
2-Cyano-6-(difluoromethyl)-3-(trifluoromethyl)pyridine-4-carboxylic acid
2-(Chloromethyl)-3-cyano-6-(difluoromethyl)-4-(trifluoromethyl)pyridine
6-Cyano-4-(difluoromethyl)-3-(trifluoromethyl)pyridine-2-carboxylic acid