Complete assignments of 1H and 13C NMR data for new dibenzocyclooctadiene lignans from Kadsura oblongifolia

Magn Reson Chem. 2009 Jul;47(7):609-12. doi: 10.1002/mrc.2430.

Abstract

Two new dibenzocyclooctadiene lignans, named kadoblongifolins A (1) and B (2), and one new natural product dibenzocyclooctadiene lignan, named kadoblongifolin C (3), were isolated from the stems of Kadsura oblongifolia (K. oblongifolia), together with five known ones, schizanrin F (4), propinquanin C (5), schisantherin G (6), heteroclitin Q (7), kadsurarin (8). The structures of these new lignans were elucidated by a combination of high-resolution electron ionization mass spectrometry (HR-EI-MS), (1)H NMR, (13)C NMR, HMQC, HMBC, and NOESY spectra.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Carbon Isotopes
  • Cyclooctanes / chemistry*
  • Hydrogen
  • Kadsura / chemistry*
  • Lignans / chemistry*
  • Magnetic Resonance Spectroscopy
  • Molecular Structure

Substances

  • Carbon Isotopes
  • Cyclooctanes
  • Lignans
  • dibenzocyclooctadiene
  • kadoblongifolin A
  • kadoblongifolin B
  • kadoblongifolin C
  • Hydrogen