testes excised during the nms were found to have a relatively high activity of the 3 beta-hydroxysteroid dehydrogenase systems of pregnenolone , 17 alpha-hydroxypregnenolone , and dehydroepiandrosterone , but the 4-ene-17 alpha-hydroxylase and 4-ene-17,20-lyase systems were apparently less active than the 5-ene-17 alpha-hydroxylase and 5-ene-17,20-lyase .
C0373704
pregnenolone
C0376260
17 alpha-hydroxypregnenolone