All

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 D02 Organic Chemicals D009930 +
  D02.092 Amines D000588 +
   D02.092.211 Biogenic Amines D001679 +
    D02.092.211.415 Biogenic Polyamines D015317 +
     D02.092.211.415.701 Putrescine D011700 
       D02.092.211.415.701.801 Spermidine D013095 
 D02 Organic Chemicals D009930 +
  D02.092 Amines D000588 +
   D02.092.782 Polyamines D011073 +
    D02.092.782.258 Diamines D003959 +
     D02.092.782.258.784 Putrescine D011700