All

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 D04 Polycyclic Hydrocarbons D011083 +
  D04.615 Polycyclic Hydrocarbons, Aromatic D011084 +
   D04.615.799 Pyrenes D011721 +
    D04.615.799.306 Benzopyrenes D001580 +
     D04.615.799.306.400 Dihydroxydihydrobenzopyrenes D004101 +
       D04.615.799.306.400.350 7,8-Dihydro-7,8-dihydroxybenzo(a)pyrene 9,10-oxide D015123