(1H-indol-3-yl)-N-methylmethanamine + S-adenosyl-L-methionine => gramine + S-adenosyl-L-homocysteine + H(+)
(1h-indol-3-yl)-n-methylmethanamine + s-adenosyl-l-methionine => gramine + s-adenosyl-l-homocysteine + h(+)