an allylic steroid produced from progesterone by rat sertoli cells and which does not appear to have been described previously as a product of gonadal or adrenal tissues has been isolated and identified as 3 alpha-hydroxy-4-pregnen-20-one ( 3 alpha-dihydroprogesterone ; 3 alpha-dhp ) .
C0033308
progesterone
C0012311
dihydroprogesterone