melatonin + S-adenosyl-L-homocysteine + H(+) => N-acetylserotonin + S-adenosyl-L-methionine
melatonin + s-adenosyl-l-homocysteine + h(+) => n-acetylserotonin + s-adenosyl-l-methionine
melatonin + S-adenosyl-L-homocysteine + H(+) => N-acetylserotonin + S-adenosyl-L-methionine
melatonin + s-adenosyl-l-homocysteine + h(+) => n-acetylserotonin + s-adenosyl-l-methionine