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