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 +
      D02.455.426.559.389.185 Biphenyl Compounds D001713 +
       D02.455.426.559.389.185.600 Niclofolan D009533 
 D02 Organic Chemicals D009930 +
  D02.640 Nitro Compounds D009574 +
   D02.640.743 Nitrophenols D009596 +
    D02.640.743.600 Niclofolan D009533 
 D02 Organic Chemicals D009930 +
  D02.755 Phenols D010636 +
   D02.755.566 Nitrophenols D009596 +
    D02.755.566.600 Niclofolan D009533