3-Cyano-2-nitro-6-(trifluoromethoxy)pyridine-4-sulfonyl chloride
3-Fluoro-2-nitro-6-(trifluoromethoxy)pyridine-5-acetic acid
3-Cyano-2-nitro-4-(trifluoromethoxy)pyridine-6-sulfonyl chloride
3-Cyano-6-iodo-2-(trifluoromethoxy)pyridine-5-sulfonyl chloride