2-Cyano-4-nitro-6-(trifluoromethoxy)pyridine-3-sulfonyl chloride
3-Cyano-5-iodo-2-(trifluoromethoxy)pyridine-6-sulfonyl chloride
Ethyl 5-fluoro-2-nitro-4-(trifluoromethoxy)pyridine-3-carboxylate
3-Cyano-4-iodo-6-(trifluoromethoxy)pyridine-2-sulfonyl chloride