3-hydroxy-4,5-dimethoxyphenethylamine + S-adenosyl-L-methionine <=> mescaline + S-adenosyl-L-homocysteine + H(+)
3-hydroxy-4,5-dimethoxyphenethylamine + s-adenosyl-l-methionine <=> mescaline + s-adenosyl-l-homocysteine + h(+)