Polyhydroxypregnane glycosides from Oxystelma esculentum var. alpini

Phytochemistry. 2004 Apr;65(7):975-80. doi: 10.1016/j.phytochem.2004.01.022.

Abstract

Three new polyhydroxypregnane glycosides named alpinoside A [kidjolanin 3-O-beta-d-glucopyranosyl-(1-->4)-beta-d-glucopyranosyl-(1-->4)-beta-d-thevetopyranosyl-(1-->4)-beta-d-cymaropyranosyl-(1-->4)-beta-d-cymaropyranoside], alpinoside B [kidjolanin 3-O-beta-d-glucopyranosyl-(1-->4)-beta-d-thevetopyranosyl-(1-->4)-beta-d-cymaropyranosyl-(1-->4)-beta-d-cymaropyranoside], and alpinoside C [kidjolanin 3-O-beta-d-glucopyranosyl-(1-->4)-beta-d-glucopyranosyl-(1-->4)-beta-d-oleandropyranosyl-(1-->4)-beta-d-cymaropyranosyl-(1-->4)-beta-d-cymaropyranoside] were isolated from the leaves of Oxystelma esculentum var. alpini. The structure elucidation was accomplished by extensive spectroscopic analysis and acid-catalyzed hydrolysis.

MeSH terms

  • Apocynaceae / chemistry*
  • Carbohydrate Conformation
  • Carbohydrate Sequence
  • Chromatography, Gas
  • Glycosides / chemistry*
  • Glycosides / isolation & purification
  • Hydrolysis
  • Hydroxylation
  • Molecular Sequence Data
  • Molecular Structure
  • Nuclear Magnetic Resonance, Biomolecular
  • Plant Components, Aerial / chemistry
  • Pregnanes / chemistry*
  • Pregnanes / isolation & purification

Substances

  • Glycosides
  • Pregnanes