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