Journal
PHYTOCHEMICAL ANALYSIS
Volume 14, Issue 2, Pages 67-73Publisher
WILEY
DOI: 10.1002/pca.689
Keywords
LC-NMR; LC-MS; catalpol derivative; cis/trans cinnamoyl isomers; Jamesbrittenia fodina; Scrophulariaceae
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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. Copyright (C) 2003 John Wiley Sons, Ltd.
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