All

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 D03 Heterocyclic Compounds D006571 +
  D03.494 Heterocyclic Compounds, 3-Ring D006575 +
   D03.494.046 Acridines D000166 +
    D03.494.046.250 Aminoacridines D000609 +
      D03.494.046.250.150 Acridine Orange D000165 
      D03.494.046.250.177 Acriflavine D000167 
      D03.494.046.250.200 Aminacrine D000585 
      D03.494.046.250.225 Amsacrine D000677 
      D03.494.046.250.450 Ethacridine D004975 
      D03.494.046.250.650 Nitracrine D009564 
      D03.494.046.250.720 Proflavine D011370 
      D03.494.046.250.760 Quinacrine D011796 +
      D03.494.046.250.900 Tacrine D013619