Structural Elucidation of a Deteriorative Substance in a Synthetic Medicine (Cui Xing Ning) by Using Mass Spectrometry

Structure of a deteriorative subatance (2) in a store synthetic medicine,Cui Xing Ning (催醒宁1), for heart disease has been elucidated by usinglow resolution mass spectrometrical technique and the cause of the medicinecolor changing from white to yellowish was exposed. The deteriorative subs-tance (2) is an atmospheric oxidation product of the medicine (1).