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Molecular structure of fagopyritol A1 (O-α-d-galactopyranosyl-(1→3)-d-chiro-inositol) by NMR

Authors
Journal
Carbohydrate Research
0008-6215
Publisher
Elsevier
Publication Date
Volume
328
Issue
4
Identifiers
DOI: 10.1016/s0008-6215(00)00133-6
Keywords
  • Fagopyrum Esculentum
  • Buckwheat
  • Seed
  • Fagopyritol A1
  • Fagopyritol B1
  • D-Chiro-Inositol
  • Galactosyl Cyclitol

Abstract

Abstract The molecular structure of fagopyritol A1, a novel galactopyranosyl cyclitol from buckwheat seeds, was determined to be O-α- d-galactopyranosyl-(1→3)- d- chiro-inositol by 1H and 13C NMR. Fagopyritol A1 is a positional isomer of fagopyritol B1 ( O-α- d-galactopyranosyl-(1→2)- d- chiro-inositol), representing a different series of fagopyritol oligomers. Trimethylsilyl derivatives of both compounds have similar mass spectra, but each may be identified by different abundance ratios of fragments with m/ z 305/318 and 318/319.

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