Synonyms: Metoprolol Tartrate Imp. A (EP),Metoprolol Succinate Imp. A (EP), Metoprolol Imp. A (EP), Metoprolol USP Related Compound A, Metoprolol USP RC A, (2RS)-1-(Ethylamino)-3-[4-(2-methoxyethyl)phenoxy]propan-2-ol, Metoprolol Related Compound A, Metoprolol Succinate Impurity A, Metoprolol Tartrate Impurity A, Metoprolol Impurity A, Metoprolol Impurity A