Detailed 1 H and 13 C NMR structural assignments of four sesquiterpene lactones isolated from Eremanthus elaeagnus (Asteraceae)

Magn Reson Chem. 2020 Oct;58(10):975-980. doi: 10.1002/mrc.5076. Epub 2020 Jul 29.

Abstract

A complete 1 H and 13 C NMR analysis for a group of four sesquiterpene lactones isolated from Eremanthus elaeagnus (Asteraceae) is described in this work. 1 H NMR, 13 C {1 H} NMR, gCOSY, gHMQC, and gHMBC experiments were performed to provide sufficient structural information to allow an unequivocal assignment. All hydrogen coupling constants were measured, clarifying all hydrogen signal multiplicities.

Publication types

  • Letter
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Asteraceae / chemistry*
  • Carbon-13 Magnetic Resonance Spectroscopy
  • Lactones / chemistry
  • Lactones / isolation & purification*
  • Molecular Conformation
  • Proton Magnetic Resonance Spectroscopy
  • Sesquiterpenes / chemistry
  • Sesquiterpenes / isolation & purification*
  • Stereoisomerism

Substances

  • Lactones
  • Sesquiterpenes