6-Cyano-2-hydroxy-3-(trifluoromethoxy)pyridine-4-methanol
3-Chloro-4-cyano-2-(difluoromethyl)-6-(trifluoromethoxy)pyridine
4-Cyano-6-hydroxy-2-(trifluoromethoxy)pyridine-3-carboxylic acid
3-Chloro-2-cyano-6-(difluoromethyl)-4-(trifluoromethoxy)pyridine