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 +
      D02.455.426.559.389.565 Nitrobenzenes D009578 +
       D02.455.426.559.389.565.225 Dinitrobenzenes D004136 
 D02 Organic Chemicals D009930 +
  D02.640 Nitro Compounds D009574 +
   D02.640.529 Nitrobenzenes D009578 +
    D02.640.529.240 Dinitrobenzenes D004136 
      D02.640.529.240.250 Dinitrochlorobenzene D004137 
      D02.640.529.240.280 Dinitrofluorobenzene D004139