Norepinephrine (hydrochloride) (Standard) is the analytical standard of Norepinephrine (hydrochloride). This product is intended for research and analytical applications. Norepinephrine (Levarterenol, L-Noradrenaline) hydrochloride is a potent adrenergic receptor (AR) agonist. Norepinephrine activates alpha1, alpha2, beta1 receptors[1][2][3][4].