All

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 D02 Organic Chemicals D009930 +
  D02.455 Hydrocarbons D006838 +
   D02.455.526 Hydrocarbons, Halogenated D006846 +
    D02.455.526.728 Mustard Compounds D009150 +
     D02.455.526.728.650 Nitrogen Mustard Compounds D009588 +
      D02.455.526.728.650.760 Quinacrine Mustard D011797 
 D03 Heterocyclic Compounds D006571 +
  D03.494 Heterocyclic Compounds, 3-Ring D006575 +
   D03.494.046 Acridines D000166 +
    D03.494.046.250 Aminoacridines D000609 +
     D03.494.046.250.760 Quinacrine D011796 +
      D03.494.046.250.760.750 Quinacrine Mustard D011797