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