preferred_name: thymine + NADH + H(+) => 5,6-dihydrothymine + NAD(+)
preferred_name_lc: thymine + nadh + h(+) => 5,6-dihydrothymine + nad(+)
label: thymine + NADH + H(+) => 5,6-dihydrothymine + NAD(+)
label_lc: thymine + nadh + h(+) => 5,6-dihydrothymine + nad(+)