All

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 D02 Organic Chemicals D009930 +
  D02.092 Amines D000588 +
   D02.092.782 Polyamines D011073 +
    D02.092.782.258 Diamines D003959 +
     D02.092.782.258.368 Ethylenediamines D005029 +
      D02.092.782.258.368.500 Methapyrilene D008701 
 D03 Heterocyclic Compounds D006571 +
  D03.383 Heterocyclic Compounds, 1-Ring D006573 +
   D03.383.725 Pyridines D011725 +
    D03.383.725.050 Aminopyridines D000631 +
     D03.383.725.050.440 Methapyrilene D008701