(R)-mandelate + NAD(+) => phenylglyoxylate + NADH + H(+)
(r)-mandelate + nad(+) => phenylglyoxylate + nadh + h(+)
(R)-mandelate + NAD(+) => phenylglyoxylate + NADH + H(+)
(r)-mandelate + nad(+) => phenylglyoxylate + nadh + h(+)