3-Cyano-4-nitro-6-(trifluoromethoxy)pyridine-2-sulfonyl chloride
3-Fluoro-6-nitro-2-(trifluoromethoxy)pyridine-4-acetonitrile
4-Fluoro-5-nitro-2-(trifluoromethoxy)pyridine-3-acetonitrile
3-Cyano-4-nitro-2-(trifluoromethoxy)pyridine-6-sulfonyl chloride