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On-line identification of the bioactive compounds from Blumea gariepina by HPLC-UV-MS and HPLC-UV-NMR, combined with HPLC-micro-fractionation.
Journal article

On-line identification of the bioactive compounds from Blumea gariepina by HPLC-UV-MS and HPLC-UV-NMR, combined with HPLC-micro-fractionation.

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  • 2005-07-07
Published in:
  • Phytochemical analysis : PCA. - 2005
Antifungal Agents
Asteraceae
Cholinesterase Inhibitors
Chromatography, High Pressure Liquid
Chromatography, Thin Layer
Flavonols
Molecular Structure
Nuclear Magnetic Resonance, Biomolecular
Plant Extracts
Spectrometry, Mass, Electrospray Ionization
Spectrophotometry, Ultraviolet
Thymol
English The dichloromethane extract of the aerial parts of Blumea gariepina (Asteraceae) was shown to be active against the phytopathogenic fungus Cladosporium cucumerinum and to inhibit acetylcholinesterase. In order rapidly to identify the active principles, the crude extract was analysed by on-flow HPLC-1H-NMR. HPLC-micro-fractionation was performed and all peaks collected were submitted to assays against C. cucumerinum and acetylcholinesterase. By this means, the biological activities could be efficiently associated with selected HPLC peaks. Complementary on-line structural data for all peaks of interest in the crude extract were obtained from HPLC-MS and from HPLC-UV with post-column addition of UV shift reagents. This chemical screening strategy with integrated bioassays permitted the on-line identification of a number of constituents and gave useful information for an efficient isolation procedure.
Language
  • English
Open access status
closed
Identifiers
Persistent URL
https://sonar.ch/global/documents/191595
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