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 D03 Heterocyclic Compounds D006571 +
  D03.438 Heterocyclic Compounds, 2-Ring D006574 +
   D03.438.150 Benzopyrans D001578 +
    D03.438.150.446 Coumarins D003374 +
      D03.438.150.446.280 Chromonar D002866 
      D03.438.150.446.350 Coumestrol D003375 
      D03.438.150.446.400 Esculin D004929 
      D03.438.150.446.677 Ochratoxins D009793 
      D03.438.150.446.794 Psoralens D011564 +
      D03.438.150.446.912 Umbelliferones D014468 +
      D03.438.150.446.520 4-Hydroxycoumarins D015110 +
      D03.438.150.446.853 Pyranocoumarins D039681