Two C21-steroidal glycosides isolated from Cynanchum stauntoi

Phytochemistry. 1999 Dec;52(7):1351-5. doi: 10.1016/s0031-9422(99)00439-2.


Studies on the roots of Cynanchum stauntoi led to the isolation of two C21-steroidal glycosides, formally named stauntosides A and B. Their structures were elucidated on the basis of spectroscopic evidence, especially that from analysis of 2D-NMR spectra. They were found to possess an unusual skeleton and were identified as stauntogenin 3-O-alpha-L-diginopyranosyl-(1-4)-beta-L-cymaropyranosyl-(1- 4)-beta-D- digitoxopyranosyl-(1-4)-beta-D-thevetopyranoside and stauntogenin 3-O-alpha-L-cymaropyranosyl-(1-4)-beta-D-digitoxopyranosyl-( 1-4)-beta-D-3- demethyl-2-deoxy-thevetopyranoside.

MeSH terms

  • Carbohydrate Conformation
  • Carbohydrate Sequence
  • China
  • Models, Molecular
  • Molecular Conformation
  • Molecular Sequence Data
  • Plant Roots / chemistry
  • Plants, Medicinal*
  • Saponins / chemistry*
  • Saponins / isolation & purification
  • Spectrometry, Mass, Fast Atom Bombardment
  • Steroids*


  • Saponins
  • Steroids
  • stauntoside A
  • stauntoside B