2-Cyano-5-iodo-6-(trifluoromethoxy)pyridine-3-acetonitrile
4-Cyano-6-hydroxy-2-(trifluoromethoxy)pyridine-3-sulfonyl chloride
5-Cyano-2-methyl-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride
4-Cyano-2-hydroxy-5-(trifluoromethoxy)pyridine-3-sulfonyl chloride