Five new pregnane glycosides from the stems of Marsdenia tenacissima

J Asian Nat Prod Res. 2011 Jun;13(6):477-85. doi: 10.1080/10286020.2011.570263.

Abstract

Activity-guided fractionation of the stems of Marsdenia tenacissima led to the isolation of five new pregnane glycosides, namely marstenacissides E (1), F (2), G (3), H (4), and I (5). Their structures were determined on the basis of (1)H and (13)C NMR, COSY, TOCSY, ROESY, and FABMS experiments.

MeSH terms

  • Glycosides / chemistry
  • Glycosides / isolation & purification*
  • Marsdenia / chemistry*
  • Molecular Structure
  • Nuclear Magnetic Resonance, Biomolecular
  • Plant Stems / chemistry
  • Pregnanes / chemistry
  • Pregnanes / isolation & purification*

Substances

  • Glycosides
  • Pregnanes