Simultaneous Extraction Optimization and Analysis of Flavonoids from the Flowers of Tabernaemontana heyneana by High Performance Liquid Chromatography Coupled to Diode Array Detector and Electron Spray Ionization/Mass Spectrometry
Figure 6
(a) Full scan ESI/MS spectra of parent ion of dicaffeic acid dimer at m/z 680 and fragment ions at m/z 340 (caffeic acid monomer), m/z 279, and m/z 184. (b) Parent ion of protonated form of kaempferol-3-O-robinoside-7-O-rhamnoside (robinin) at m/z 741 and [M + H]2−m/z 740.
