Isocyanide
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![Xanthocillin is a rare natural product that contains an isocyanide group (two in fact).](/Images/godic/202501/21/Xantocillin.svg0439.png")
An isocyanide (also called isonitrile or carbylamine) is an organic compound with the functional group -N≡C. It is the isomer of the related cyanide (-C≡N), hence the prefix iso. The organic fragment is connected to the isocyanide group via the nitrogen atom, not via the carbon. They are used as building blocks for the synthesis of other compounds.