label: 3-hydroxy-4,5-dimethoxyphenethylamine + S-adenosyl-L-homocysteine + H(+) => 3,4-dihydroxy-5-methoxyphenethylamine + S-adenosyl-L-methionine
label_lc: 3-hydroxy-4,5-dimethoxyphenethylamine + s-adenosyl-l-homocysteine + h(+) => 3,4-dihydroxy-5-methoxyphenethylamine + s-adenosyl-l-methionine