(R)-pantoate + NAD(+) = 2-dehydropantoate + NADH + H(+)
(r)-pantoate + nad(+) = 2-dehydropantoate + nadh + h(+)
(R)-pantoate + NAD(+) = 2-dehydropantoate + NADH + H(+)
(r)-pantoate + nad(+) = 2-dehydropantoate + nadh + h(+)