(S)-lactate + NADH + 2 H(+) => (S)-lactaldehyde + NAD(+) + H2O
(s)-lactate + nadh + 2 h(+) => (s)-lactaldehyde + nad(+) + h2o
(S)-lactate + NADH + 2 H(+) => (S)-lactaldehyde + NAD(+) + H2O
(s)-lactate + nadh + 2 h(+) => (s)-lactaldehyde + nad(+) + h2o