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