Synonyms : Acetylserotonin Methyltransferase, Oxyindol-O-Methyltransferase, Acetylserotonin N Methyltransferase, Hydroxyindole O Methyltransferase, Methyltransferase, Acetylserotonin, N-Methyltransferase, Acetylserotonin, O-Methyltransferase, Hydroxyindole