preferred_name: 2-oxobutanoate + FADH2 => (2R)-hydroxybutanoate + FAD + H(+)
preferred_name_lc: 2-oxobutanoate + fadh2 => (2r)-hydroxybutanoate + fad + h(+)
label: 2-oxobutanoate + FADH2 => (2R)-hydroxybutanoate + FAD + H(+)
label_lc: 2-oxobutanoate + fadh2 => (2r)-hydroxybutanoate + fad + h(+)