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