the delta 5 intermediates , 17-hydroxypregnenolone ( 3 beta , 17-dihydroxy-5-pregnen-20-one ) and dehydroepiandrosterone ( 3 beta-hydroxy-5-androsten-17-one ) , accounted for less than 1 % of substrate conversion , indicating a clear preference for leydig cells to metabolize ( 3h ) pregnenolone via the delta 4 pathway .
C0376260
17-hydroxypregnenolone
C0373704
pregnenolone