label: 5-carboxymethoxyuridine(34) in tRNA + S-adenosyl-L-methionine = 5-methoxycarbonylmethoxyuridine(34) in tRNA + S-adenosyl-L-homocysteine
label_lc: 5-carboxymethoxyuridine(34) in trna + s-adenosyl-l-methionine = 5-methoxycarbonylmethoxyuridine(34) in trna + s-adenosyl-l-homocysteine