All

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 D04 Polycyclic Hydrocarbons D011083 +
  D04.808 Steroids D013256 +
   D04.808.668 Norsteroids D009654 +
    D04.808.668.651 Norpregnanes D009650 +
     D04.808.668.651.693 Norpregnenes D009652 +
       D04.808.668.651.693.223 Ethylestrenol D005032 
       D04.808.668.651.693.279 Ethynodiol Diacetate D005040 
       D04.808.668.651.693.362 Gestonorone Caproate D005866 
       D04.808.668.651.693.494 Lynestrenol D008234 
       D04.808.668.651.693.595 Norethandrolone D009639 
       D04.808.668.651.693.651 Norethindrone D009640 
       D04.808.668.651.693.706 Norethynodrel D009641 
       D04.808.668.651.693.762 Norgestrel D009644 +
       D04.808.668.651.693.820 Norprogesterones D009653 
       D04.808.668.651.693.175 Desogestrel D017135