All

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 D03 Heterocyclic Compounds D006571 +
  D03.132 Alkaloids D000470 +
   D03.132.889 Tropanes D014326 +
    D03.132.889.354 Cocaine D003042 +
     D03.132.889.354.250 Crack Cocaine D016578 
 D03 Heterocyclic Compounds D006571 +
  D03.605 Heterocyclic Compounds, Bridged-Ring D006572 +
   D03.605.869 Tropanes D014326 +
    D03.605.869.388 Cocaine D003042 +
     D03.605.869.388.250 Crack Cocaine D016578 
 D26 Pharmaceutical Preparations D004364 +
  D26.878 Street Drugs D013287 +
   D26.878.250 Crack Cocaine D016578