Aloe species by liquid chromatography/electrospray tandem mass spectrometry



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Eur. J. Mass Spectrom. 7, 481 - 490 (2001)

Structural investigations of 5-methylchromone glycosides from Aloe species by liquid chromatography/electrospray tandem mass spectrometry

Jürgen Schmidt* and Torsten Blitzke
Institut für Pflanzenbiochemie, Weinberg 3, D-06120 Halle/S., . Email:
Mohamed Masaoud
Department of Chemistry, University of Sanáa, Sanáa, Republic of Yemen

ABSTRACT:
The mass spectral behavior of a series of 5-methylchromone glycosides isolated from two Aloe species was investigated by liquid chromatography/positive-ion electrospray (ES) mass spectrometry using collision-induced dissociation (CID) mass spectrometry. The CID mass spectra of the [M + H]+ ions show a typical fragmentation pattern reflecting the several substructures (substitution at C-7, C-9 and C-10, position and nature of the ester moiety at C-2') of the 5-methylchromone glycosides. Besides a series of known 5-methylchromone glycosides, nine new compounds of this type were identified by LC/ES-CIDMS from Aloe rubroviolacea and Aloe perryi (Aloeaceae).

Keywords: liquid chromatography/mass spectrometry (LC/MS), electrospray tandem mass spectrometry, 5-methylchromone glycosides, Aloe rubroviolacea, Aloe perryi, Aloeaceae

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