1H and 13C NMR signal assignment of cucurbitacin derivatives from Citrullus colocynthis (L.) Schrader and Ecballium elaterium L. (Cucurbitaceae)

Magn Reson Chem. 2005 Jun;43(6):489-91. doi: 10.1002/mrc.1570.

Abstract

2D NMR-derived 1H and 13C NMR signal assignments of six structurally closely related cucurbitacin derivatives are presented. The investigated 2-O-beta-D-glucopyranosylcucurbitacins I, J, K, and L were obtained from Citrullus colocynthis (L.) Schrader whereas the aglyca cucurbitacin E and I were isolated from Ecballium elaterium L.

MeSH terms

  • Carbon Isotopes
  • Citrullus / chemistry*
  • Cucurbitaceae / chemistry*
  • Cucurbitacins
  • Magnetic Resonance Spectroscopy / methods*
  • Magnetic Resonance Spectroscopy / standards*
  • Molecular Conformation
  • Protons
  • Reference Standards
  • Triterpenes / chemistry*

Substances

  • Carbon Isotopes
  • Protons
  • Triterpenes
  • Cucurbitacins