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 D04 Polycyclic Hydrocarbons D011083 +
  D04.808 Steroids D013256 +
   D04.808.247 Cholestanes D002776 +
    D04.808.247.222 Cholestenes D002782 +
     D04.808.247.222.265 Cholestenones D002783 +
      D04.808.247.222.265.165 Ecdysteroids D026461 +
       D04.808.247.222.265.165.750 Ecdysterone D004441 

 D06 Hormones, Hormone Substitutes, and Hormone Antagonists D006730 +
  D06.472 Hormones D006728 +
   D06.472.445 Invertebrate Hormones D007447 +
    D06.472.445.573 Insect Hormones D007301 +
     D06.472.445.573.271 Ecdysteroids D026461 +
      D06.472.445.573.271.750 Ecdysterone D004441