B. Vogler et al., COMBINATION OF LC-MS AND LC-NMR AS A TOOL FOR THE STRUCTURE DETERMINATION OF NATURAL-PRODUCTS, Journal of natural products, 61(2), 1998, pp. 175-178
Application of both LC-MS and LC-NMR to a partially purified extract o
f Vernonia fastigiata led to the direct identification of antibacteria
l sesquiterpene lactones 1-9 without isolation of individual compounds
. The rapid structural analysis of both major and minor components of
this class of compounds demonstrated the power of structure-guided scr
eening as a complementary method to assay-guided screening.