label: (R)-3-(indol-3-yl)-2-oxobutanoate + NADH + H(+) => (2S,3R)-2-hydroxy-3-(indol-3-yl)butanoate + NAD(+)
label_lc: (r)-3-(indol-3-yl)-2-oxobutanoate + nadh + h(+) => (2s,3r)-2-hydroxy-3-(indol-3-yl)butanoate + nad(+)