All

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 D02 Organic Chemicals D009930 +
  D02.092 Amines D000588 +
   D02.092.831 Propylamines D011437 +
    D02.092.831.690 Promethazine D011398 
 D03 Heterocyclic Compounds D006571 +
  D03.494 Heterocyclic Compounds, 3-Ring D006575 +
   D03.494.741 Phenothiazines D010640 +
    D03.494.741.670 Promethazine D011398