Molecular structure of fagopyritol A1 (O-alpha-D-galactopyranosyl-(1 --> 3)-D-chiro-inositol) by NMR.
The molecular structure of fagopyritol A1, a novel galactopyranosyl cyclitol from buckwheat seeds, was determined to be O-alpha-D-galactopyranosyl-(1 --> 3)-D-chiro-inositol by 1H and 13C NMR. Fagopyritol A1 is a positional isomer of fagopyritol B1 (O-alpha-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.
Obendorf
R L
RL
Department of Crop and Soil Sciences, Cornell University, Ithaca, NY 14853-1901, USA. rlo1@cornell.edu
Steadman
K J
KJ
Fuller
D J
DJ
Horbowicz
M
M
Lewis
B A
BA
D002240:Carbohydrate Sequence; D004187:Disaccharides / Q000737:chemistry*; D019612:Fagopyrum / Q000737:chemistry; D013058:Mass Spectrometry; D019906:Nuclear Magnetic Resonance, Biomolecular; D012639:Seeds / Q000737:chemistry; D017421:Sequence Analysis
D004187:Disaccharides; C424842:fagopyritol A1; C112483:fagopyritol B1