4-Cyano-3-hydroxy-2-(trifluoromethoxy)pyridine-5-methanol
6-Cyano-4-(difluoromethyl)-3-hydroxy-2-(trifluoromethoxy)pyridine
2-Cyano-4-(difluoromethyl)-3-hydroxy-5-(trifluoromethoxy)pyridine
2-Cyano-4-methoxy-6-(trifluoromethoxy)pyridine-3-sulfonyl chloride