Figure 3

Representative multiple reaction monitoring (MRM) chromatograms of the mixed standard solution (A) and test solution of Sinomenium acutum stem sample (Q5) (B); 1. higenamine; 2. acutumine, 3. sinomenine; 4. coclaurine, 5. magnocurarine, 6. sinoacutine, 7. magnoflorine, 8. columbamine, 9. jatrorrhizine, 10. palmatine, and 11. 8-oxypalmatine.