All

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 D03 Heterocyclic Compounds D006571 +
  D03.132 Alkaloids D000470 +
   D03.132.920 Veratrum Alkaloids D014704 +
    D03.132.920.256 Cevanes D002595 +
     D03.132.920.256.815 Veratrine D014702 +
      D03.132.920.256.815.850 Veratridine D014701 
 D03 Heterocyclic Compounds D006571 +
  D03.549 Heterocyclic Compounds with 4 or More Rings D006576 +
   D03.549.256 Cevanes D002595 +
    D03.549.256.815 Veratrine D014702 +
     D03.549.256.815.850 Veratridine D014701