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 D03 Heterocyclic Compounds D006571 +
  D03.438 Heterocyclic Compounds, 2-Ring D006574 +
   D03.438.150 Benzopyrans D001578 +
     D03.438.150.240 Chromans D002839 +
     D03.438.150.266 Chromones D002867 +
     D03.438.150.320 Citrinin D002953 
     D03.438.150.446 Coumarins D003374 +
     D03.438.150.500 Ellagic Acid D004610 
     D03.438.150.600 Hematoxylin D006416 
     D03.438.150.650 Novobiocin D009675 
     D03.438.150.819 Vitamin E D014810 
     D03.438.150.455 Cromakalim D019806