the cells were challenged with the co precursor steroids ( all at 10 ( -5 ) mol/l ) pregnenolone ( pe ) , 17-hydroxy-pregnenolone ( 17-pe ) , progesterone ( po ) , 17-hydroxyprogesterone ( 17-po ) , 21-deoxycortisol ( 21-doc ) and 11-deoxycortisol ( 11-doc ) , or 1-24 adrenocorticotrophin ( acth , 100 ng/l ) in the presence or absence of either etomidate , megestrol acetate , metyrapone or trilostane ( all at 5 x 10 ( -5 ) mol/l ) .
C0020387
17-hydroxyprogesterone
C0033308
po