All

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 D02 Organic Chemicals D009930 +
  D02.092 Amines D000588 +
   D02.092.710 2-Naphthylamine D015081 
 D04 Polycyclic Hydrocarbons D011083 +
  D04.615 Polycyclic Hydrocarbons, Aromatic D011084 +
   D04.615.638 Naphthalenes D009281 +
    D04.615.638.850 2-Naphthylamine D015081