(17R,20S)-17,20-dihydroxypregn-4-en-3-one + NADP(+) => 17alpha-hydroxyprogesterone + NADPH + H(+)
(17r,20s)-17,20-dihydroxypregn-4-en-3-one + nadp(+) => 17alpha-hydroxyprogesterone + nadph + h(+)
(17R,20S)-17,20-dihydroxypregn-4-en-3-one + NADP(+) => 17alpha-hydroxyprogesterone + NADPH + H(+)
(17r,20s)-17,20-dihydroxypregn-4-en-3-one + nadp(+) => 17alpha-hydroxyprogesterone + nadph + h(+)