label: 5-(carboxymethyl)uridine(34) in tRNA + S-adenosyl-L-methionine <=> 5-(2-methoxy-2-oxoethyl)uridine(34) in tRNA + S-adenosyl-L-homocysteine
label_lc: 5-(carboxymethyl)uridine(34) in trna + s-adenosyl-l-methionine <=> 5-(2-methoxy-2-oxoethyl)uridine(34) in trna + s-adenosyl-l-homocysteine