label: 5,6-dihydrouracil + 5-phospho-alpha-D-ribose 1-diphosphate => 5,6-dihydrouridine 5'-phosphate + diphosphate
label_lc: 5,6-dihydrouracil + 5-phospho-alpha-d-ribose 1-diphosphate => 5,6-dihydrouridine 5'-phosphate + diphosphate