Synonyms : 5-HIAA, 5-Hydroxy-3-Indoleacetic Acid, 5-Hydroxyindolamine Acetic Acid, 5 Hydroxy 3 Indoleacetic Acid, 5 Hydroxyindolamine Acetic Acid, Acetic Acid, 5-Hydroxyindolamine, Acid, 5-Hydroxy-3-Indoleacetic, Acid, 5-Hydroxyindolamine Acetic