label: 5,6-dihydroxy-3-methyl-2-oxo-1,2-dihydroquinoline + NADH + H(+) => 5,6-dihydroxy-3-methyl-5,6-dihydroquinolin-2(1H)-one + NAD(+)
label_lc: 5,6-dihydroxy-3-methyl-2-oxo-1,2-dihydroquinoline + nadh + h(+) => 5,6-dihydroxy-3-methyl-5,6-dihydroquinolin-2(1h)-one + nad(+)