conversion of [ 3h ] pregnenolone to [ 3h ] progesterone and [ 3h ] 17-hydroxypregnenolone to [ 3h ] 17-hydroxyprogesterone was prevented by the addition of cyanoketone , an inhibitor of 3 beta-hydroxysteroid dehydrogenase .
C0033308
progesterone
C0020387
17-hydroxyprogesterone