Synonyms: Metoprolol-(+,-) (+)-tartrate salt;2-Propanol,1-[4-(2-methoxyethyl)phenoxy]-3- [(1-methylethyl)amino]-,(2R,3R)-2,3- dihydroxybutanedioate (2:1) (salt);Betaloc;Beloc;Seloken;Lopressor;Metoprolol tartrate (JAN/USP);Lopresor;(2R,3R)-2,3-dihydroxybutanedioic acid; 1-[4-(2-methoxyethyl)phenoxy]-3-(propan-2-ylamino)propan-2-ol;Prestwick_1009;2,3-dihydroxybutanedioic acid; 1-[4-(2-methoxyethyl)phenoxy]-3-(propan-2-ylamino)propan-2-ol;Lopressor (TN);Metoprolol tartaric acid;