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      2.   Ethers
        Alcohols
        Acids
        Quinones
        Carboxylic acid derivat...
        Amines
        Ketones
        Hydrocarbons--alkanes
        Hydrocarbons--olefins
        Hydrocarbons--Arom...
        Heterocyclic compoun...
        Nitriles
        Aldehydes
        Other organic chemical...
         
        Nitriles
          Acetonitrile
          Acrylonitrile
          2 - butene nitrile
         
         
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