(R)-mevalonate + NAD(+) => (R)-mevaldate + NADH + H(+)
(r)-mevalonate + nad(+) => (r)-mevaldate + nadh + h(+)
(R)-mevalonate + NAD(+) => (R)-mevaldate + NADH + H(+)
(r)-mevalonate + nad(+) => (r)-mevaldate + nadh + h(+)