Molecular structure of fagopyritol A1 (O-alpha-D-galactopyranosyl-(1 --> 3)-D-chiro-inositol) by NMR |
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| Authors: | Obendorf R L Steadman K J Fuller D J Horbowicz M Lewis B A |
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| Institution: | Department of Crop and Soil Sciences, Cornell University, Ithaca, NY 14853-1901, USA. rlo1@cornell.edu |
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| Abstract: | 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. |
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