All

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 D02 Organic Chemicals D009930 +
  D02.455 Hydrocarbons D006838 +
   D02.455.526 Hydrocarbons, Halogenated D006846 +
    D02.455.526.581 Hydrocarbons, Iodinated D006847 +
      D02.455.526.581.496 Iodobenzenes D007462 +