label: 5-hydroxy-3-methyl-O-methyl-L-tyrosine + S-adenosyl-L-homocysteine + H(+) => 5-hydroxy-3-methyl-L-tyrosine + S-adenosyl-L-methionine
label_lc: 5-hydroxy-3-methyl-o-methyl-l-tyrosine + s-adenosyl-l-homocysteine + h(+) => 5-hydroxy-3-methyl-l-tyrosine + s-adenosyl-l-methionine