All

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 D03 Heterocyclic Compounds D006571 +
  D03.132 Alkaloids D000470 +
   D03.132.206 Cinchona Alkaloids D002930 +
    D03.132.206.719 Quinine D011803 
 D03 Heterocyclic Compounds D006571 +
  D03.438 Heterocyclic Compounds, 2-Ring D006574 +
   D03.438.810 Quinolines D011804 +
    D03.438.810.762 Quinine D011803 
 D03 Heterocyclic Compounds D006571 +
  D03.605 Heterocyclic Compounds, Bridged-Ring D006572 +
   D03.605.687 Quinuclidines D011812 +
    D03.605.687.762 Quinine D011803