4-Cyano-2-hydroxy-3-(trifluoromethoxy)pyridine-6-carboxylic acid
3-(Chloromethyl)-5-cyano-6-methyl-2-(trifluoromethoxy)pyridine
3-Cyano-5-hydroxy-6-(trifluoromethoxy)pyridine-2-carboxylic acid
3-Cyano-6-(difluoromethyl)-4-methyl-2-(trifluoromethoxy)pyridine