All

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 D02 Organic Chemicals D009930 +
  D02.719 Organothiophosphorus Compounds D009946 +
   D02.719.199 Coumaphos D003372 
 D03 Heterocyclic Compounds D006571 +
  D03.438 Heterocyclic Compounds, 2-Ring D006574 +
   D03.438.150 Benzopyrans D001578 +
    D03.438.150.446 Coumarins D003374 +
     D03.438.150.446.912 Umbelliferones D014468 +
      D03.438.150.446.912.326 Coumaphos D003372