Atenlol Imp G

Atenlol Imp G is a structurally related impurity derived from Atenolol via oxidative deamination, substituting the primary amine with a hydroxyl group and introducing a carbonyl moiety. This compound features a 4-hydroxycinnamic acid scaffold with a substituted piperidine ring, exhibiting enhanced polarity due to the diol functionality. It arises as a degradation byproduct under alkaline stress conditions, serving as a reference standard for HPLC-based impurity profiling in Atenolol drug substance analysis.