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© May 2005 Lorentz JÄNTSCHI && Sorana Daniela BOLBOACĂ

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 D02 Organic Chemicals D009930 +
  D02.455 Hydrocarbons D006838 +
   D02.455.526 Hydrocarbons, Halogenated D006846 +
    D02.455.526.439 Hydrocarbons, Chlorinated D006843 +
     D02.455.526.439.516 Heptachlor D006533 +
       D02.455.526.439.516.350 Heptachlor Epoxide D006534