All

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 D02 Organic Chemicals D009930 +
  D02.806 Quinones D011809 +
   D02.806.400 Indolequinones D045563 
 D03 Heterocyclic Compounds D006571 +
  D03.438 Heterocyclic Compounds, 2-Ring D006574 +
   D03.438.473 Indoles D007211 +
    D03.438.473.412 Indolequinones D045563