(R,S)-butane-2,3-diol + NAD(+) = (R)-acetoin + NADH + H(+)
(r,s)-butane-2,3-diol + nad(+) = (r)-acetoin + nadh + h(+)
(R,S)-butane-2,3-diol + NAD(+) = (R)-acetoin + NADH + H(+)
(r,s)-butane-2,3-diol + nad(+) = (r)-acetoin + nadh + h(+)