Figure 1From: Validated method to measure yakuchinone A in plasma by LC-MS/MS and its application to a pharmacokinetic study in ratsTypical MS/MS product ion spectra of yakuchinone A and B. The intensities of the [M + H]+or the [M-H]- ions produced in the ESI source were compared for both analytes. The chemical structures and MS/MS conditions are shown on the upper and the lower panel, respectively. The experiment was performed under Manually Tuning mode by a syringe infusing the standard solution of Yakuchinone A and B (1 μg/ml) at a rate of 5 μL/min.Back to article page