this antiserum ( gunma ogp # 1 ) displayed little or no cross reaction with 20 alpha-dihydroprogesterone ( 0.38 % ) , pregnenolone ( 0.44 % ) , 17 alpha hydroxypregnenolone ( less than 0.1 % ) , 20 beta hydroxyprogesterone ( 2.4 % ) , 17 alpha hydroxyprogesterone ( 2.88 % ) or deoxycorticosterone ( 2.19 % ) .
C0373704
pregnenolone
C0376260
17 alpha hydroxypregnenolone