(R)-pantoate + NAD(+) => (R)-4-dehydropantoate + NADH + H(+)
(r)-pantoate + nad(+) => (r)-4-dehydropantoate + nadh + h(+)
(R)-pantoate + NAD(+) => (R)-4-dehydropantoate + NADH + H(+)
(r)-pantoate + nad(+) => (r)-4-dehydropantoate + nadh + h(+)