All

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 D02 Organic Chemicals D009930 +
  D02.455 Hydrocarbons D006838 +
   D02.455.849 Terpenes D013729 +
    D02.455.849.291 Diterpenes D004224 +
     D02.455.849.291.206 Diterpenes, Abietane D045784 
 D04 Polycyclic Hydrocarbons D011083 +
  D04.615 Polycyclic Hydrocarbons, Aromatic D011084 +
   D04.615.723 Phenanthrenes D010616 +
    D04.615.723.590 Diterpenes, Abietane D045784