5alpha-steroidal glycosides from Parepigynum funingense

J Nat Prod. 2003 Jun;66(6):898-900. doi: 10.1021/np020411o.

Abstract

Four new 5alpha-steroidal glycosides with an unusual framework, funingenosides A (1), B (2), C (3), and D (4), were isolated from the roots of Parepigynum funingense. Their structures were elucidated on the basis of 1D and 2D NMR techniques. The structure and relative stereochemistry of compound 1 were demonstrated by X-ray crystallographic analysis.

MeSH terms

  • Apocynaceae / chemistry*
  • China
  • Crystallography, X-Ray
  • Glycosides / chemistry
  • Glycosides / isolation & purification*
  • Hydrolysis
  • Molecular Conformation
  • Molecular Structure
  • Nuclear Magnetic Resonance, Biomolecular
  • Plant Roots / chemistry
  • Stereoisomerism
  • Steroids / chemistry
  • Steroids / isolation & purification*

Substances

  • Glycosides
  • Steroids