All

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 D04 Polycyclic Hydrocarbons D011083 +
  D04.615 Polycyclic Hydrocarbons, Aromatic D011084 +
   D04.615.117 Anthracenes D000873 +
    D04.615.117.306 Benzanthracenes D001551 +
     D04.615.117.306.500 Methylcholanthrene D008748