3-Cyano-6-(difluoromethyl)-4-hydroxypyridine-2-sulfonyl chloride
3-Cyano-5-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-4-carboxylic acid
2-Amino-3-hydroxy-6-(trifluoromethoxy)pyridine-5-sulfonamide
5-Fluoro-2-(fluoromethyl)-3-(trifluoromethoxy)pyridine-4-acetonitrile