All

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 D04 Polycyclic Hydrocarbons D011083 +
  D04.615 Polycyclic Hydrocarbons, Aromatic D011084 +
   D04.615.597 Naphthacenes D009279 +
    D04.615.597.900 Tetracyclines D013754 +
      D04.615.597.900.146 Chlortetracycline D002751 
      D04.615.597.900.185 Demeclocycline D003707 
      D04.615.597.900.200 Doxycycline D004318 
      D04.615.597.900.450 Lymecycline D008194 
      D04.615.597.900.525 Methacycline D008690 
      D04.615.597.900.550 Minocycline D008911 
      D04.615.597.900.600 Oxytetracycline D010118 
      D04.615.597.900.720 Rolitetracycline D012382 
      D04.615.597.900.875 Tetracycline D013752