Simultaneous Determination of Six Uncaria Alkaloids in Mouse Blood by UPLC–MS/MS and Its Application in Pharmacokinetics and Bioavailability

Figure 2

Mass spectrum of rhynchophylline, isorhynchophylline, corynoxeine, isocorynoxeine, hirsutine, hirsuteine, and midazolam (IS).

(a) Rhynchophylline

(b) Isorhynchophylline

(c) Corynoxeine

(d) Isocorynoxeine

(e) Hirsuitine

(f) Hirsuitine

(g) Midazolam