Research Article

Effect of Naoxintong Capsules on the Activities of CYP450 and Metabolism of Metoprolol Tartrate in Rats Evaluated by Probe Cocktail and Pharmacokinetic Methods

Table 2

Mass spectra properties of the target ingredients.

AnalysesPrecursor ion (m/z)Product ion (m/z)Fragmentor (V)CE (V)

Metoprolol tartrate268.2121.111020
α-Hydroxymetoprolol284.2116.112014
O-demethylmetoprolol254.2116.111023
Propranolol hydrochloride (IS)260.2155.19023