(3R)-3-hydroxy-4-oxobutanoate + NAD(+) + H2O => (R)-malate + NADH + 2 H(+)
(3r)-3-hydroxy-4-oxobutanoate + nad(+) + h2o => (r)-malate + nadh + 2 h(+)
(3R)-3-hydroxy-4-oxobutanoate + NAD(+) + H2O => (R)-malate + NADH + 2 H(+)
(3r)-3-hydroxy-4-oxobutanoate + nad(+) + h2o => (r)-malate + nadh + 2 h(+)