All

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 D04 Polycyclic Hydrocarbons D011083 +
  D04.808 Steroids D013256 +
   D04.808.745 Pregnanes D011278 +
    D04.808.745.745 Pregnenes D011283 +
      D04.808.745.745.183 Cortisone D003348 
      D04.808.745.745.279 Dimethisterone D004116 
      D04.808.745.745.379 Ethisterone D005003 
      D04.808.745.745.654 Pregnenediones D011282 +
      D04.808.745.745.725 Pregnenolone D011284 +
      D04.808.745.745.855 Spironolactone D013148