the same pattern of incorporation was found when gradually increasing amounts of non-labelled pregnenolone , progesterone , 17-hydroxypregenenolone , 17-hydroxyprogesterone , dehydroepiandrosterone , dehydroepiandrosterone sulphate or testosterone were added to the system as `` '' trapping agents '' '' or when leydig cell preparations rather than decapsulated testes were used .
C0033308
progesterone
C0020387
17-hydroxyprogesterone