Structural analysis of selected characteristic flavones by electrospray tandem mass spectrometry.
Seven structure analogical flavonoid aglycones have been analyzed using electrospray ionization tandem mass spectrometry (ESI-MSn) in the negative-ion mode. The spectra obtained ESI-MSn allowed us to propose plausible schemes for their fragmentation mechanism. By analyzing the product ions spectra of deprotonated molecule ions [M-H](-), some neutral diagnostic losses and specific retro Diels-Alder fragments were obtained. By using all of these characteristic fragment ions we can specially differentiate the flavone isomer.
Wu
Wei
W
Laboratory of New Drug Research and Mass Spectrometry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, PR, China.
Liu
Zhiqiang
Z
Song
Fengrui
F
Liu
Shuying
S
D005419:Flavonoids / Q000032:analysis*; D007477:Ions; D008956:Models, Chemical; D010936:Plant Extracts; D012680:Sensitivity and Specificity; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
D005419:Flavonoids; D007477:Ions; D010936:Plant Extracts