Synonyms: 4-[(2RS)-2-Hydroxy-3-[(1-methylethyl)amino]propoxy]benzaldehyde Hydrochloride, Bisoprolol Fumarate Imp. L (EP) as Hydrochloride, Metoprolol Succinate Imp. C (EP) as Hydrochloride, Metoprolol Tartrate Imp. C (EP) as Hydrochloride,4-[[(2RS)-2-Hydroxy-3-(isopropylamino)propyl]oxy]benzaldehyde Hydrochloride, Benzaldehyde, 4-[2-hydroxy-3-[(1-methylethyl)amino]propoxy]-, hydrochloride (1:1) (ACI)