All

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 D04 Polycyclic Hydrocarbons D011083 +
  D04.808 Steroids D013256 +
   D04.808.247 Cholestanes D002776 +
    D04.808.247.222 Cholestenes D002782 +
     D04.808.247.222.222 Cholestadienes D002774 +
      D04.808.247.222.222.347 Cholestadienols D002775 +
       D04.808.247.222.222.347.389 Fusidic Acid D005672 
 D04 Polycyclic Hydrocarbons D011083 +
  D04.808 Steroids D013256 +
   D04.808.247 Cholestanes D002776 +
    D04.808.247.808 Sterols D013261 +
     D04.808.247.808.489 Fusidic Acid D005672