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Scientific article
English

On-line identification of unstable catalpol derivatives from Jamesbrittenia fodina by LC-MS and LC-NMR

Published inPhytochemical analysis, vol. 14, no. 2, p. 67-73
Publication date2003
Abstract

LC-UV-MS analysis of the methanol extract of Jamesbrittenia fodina O. M. Hilliard (Scrophulariaceae) revealed the presence of cinnamic ester derivatives. Two isomeric pairs of these constituents were detected, but could not be isolated. In order to identify these unstable compounds, LC-H-1-NMR spectra were obtained for each individual isomer and standard NMR measurements were performed in-mixture. The spectra clearly demonstrated that the fractions consisted of mixtures of cis and trans cinnamoyl catalpol glycoside esters.

Keywords
  • lc-nmr
  • lc-ms
  • catalpol derivative
  • cis/trans cinnamoyl isomers
  • jamesbrittenia fodina
  • scrophulariaceae
  • premna-japonica leaves
Affiliation Not a UNIGE publication
Citation (ISO format)
COGNE, A.-L. et al. On-line identification of unstable catalpol derivatives from Jamesbrittenia fodina by LC-MS and LC-NMR. In: Phytochemical analysis, 2003, vol. 14, n° 2, p. 67–73. doi: 10.1002/pca.689
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ISSN of the journal0958-0344
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