All

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 D02 Organic Chemicals D009930 +
  D02.455 Hydrocarbons D006838 +
   D02.455.426 Hydrocarbons, Cyclic D006844 +
    D02.455.426.559 Hydrocarbons, Aromatic D006841 +
     D02.455.426.559.389 Benzene Derivatives D001555 +
      D02.455.426.559.389.150 Benzylidene Compounds D001597 +
       D02.455.426.559.389.150.795 Tyrphostins D020032 
 D02 Organic Chemicals D009930 +
  D02.626 Nitriles D009570 +
   D02.626.886 Tyrphostins D020032 
 D03 Heterocyclic Compounds D006571 +
  D03.438 Heterocyclic Compounds, 2-Ring D006574 +
   D03.438.857 Quinoxalines D011810 +
    D03.438.857.885 Tyrphostins D020032