label: 5-methoxyuridine(34) in tRNA + S-adenosyl-L-homocysteine + H(+) => 5-hydroxyuridine(34) in tRNA + S-adenosyl-L-methionine
label_lc: 5-methoxyuridine(34) in trna + s-adenosyl-l-homocysteine + h(+) => 5-hydroxyuridine(34) in trna + s-adenosyl-l-methionine