(25R)-7alpha,26-dihydroxycholest-4-en-3-one + NADH + H(+) => (25R)-cholest-5-en-3beta,7alpha,26-triol + NAD(+)
(25r)-7alpha,26-dihydroxycholest-4-en-3-one + nadh + h(+) => (25r)-cholest-5-en-3beta,7alpha,26-triol + nad(+)