5-Cyano-3-nitro-4-(trifluoromethoxy)pyridine-2-acetonitrile
3-Cyano-4-iodo-2-(trifluoromethoxy)pyridine-6-acetonitrile
3-Cyano-5-nitro-2-(trifluoromethoxy)pyridine-4-acetonitrile
3-Cyano-2-iodo-6-(trifluoromethoxy)pyridine-4-acetonitrile
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