Nortriptyline (hydrochloride) (Standard) is the analytical standard of Nortriptyline (hydrochloride). This product is intended for research and analytical applications. Nortriptyline (Desmethylamitriptyline) hydrochloride, the main active metabolite of Amitriptyline, is a tricyclic antidepressant. Nortriptyline hydrochloride is a potent autophagy inhibitor and has anticancer effects[1][2][3].