label: N-methyl-3,4-dihydroxy-5-methoxyphenethylamine + S-adenosyl-L-methionine = N,N-dimethyl-3,4-dihydroxy-5-methoxyphenethylamine + S-adenosyl-L-homocysteine + H(+)
label_lc: n-methyl-3,4-dihydroxy-5-methoxyphenethylamine + s-adenosyl-l-methionine = n,n-dimethyl-3,4-dihydroxy-5-methoxyphenethylamine + s-adenosyl-l-homocysteine + h(+)