Metoprolol Standard

(±)1-(Isopropylamino)-3-[p-(β-methoxyethyl)phenoxy]-2-propanol (+)-tartrate salt; 1-(Isopropylamino)-3-[4-(2-methoxyethyl)phenoxy]propan-2-ol; rac Metoprolol; (±)-Metoprolol; Lopressor; 1-[4-(2-Methoxyethyl)phenoxy]-3-[(1-methylethyl)amino]-2-propanol; Metoprolol (USP);