1,1โฒ-[(1-Methylethyl)imino]bis[3-[4-(2-methoxyethyl)phenoxy]-2-propanol] (ACI),3,3'-(isopropylazanediyl)bis(1-(4-(2-methoxyethyl)phenoxy)propan-1,1,2,3,3-d5-2-ol),"Labeled Metoprolol , intended for use as an internal standard for the quantification of Metoprolol by GC- or LC-mass spectrometry.",Metoprolol Impurity
