The LC-MS/MS-Based Measurement of Isopimaric Acid in Rat Plasma and Application of Pharmacokinetics

Figure 2

Comparative chromatograms of selectivity of betulinic acid (IS) and IPA of blank plasma (a), spiked standard solution in blank plasma (b), and rat plasma samples after administering (c). The peaks marked in chromatograms were as follows: (1): betulinic acid (IS) and (2): IPA.

(a)

(b)

(c)