title: Molecular structure of fagopyritol A1 (O-alpha-D-galactopyranosyl-(1 --> 3)-D-chiro-inositol) by NMR.
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.
authors.affiliation: Department of Crop and Soil Sciences, Cornell University, Ithaca, NY 14853-1901, USA. rlo1@cornell.edu
authors.forename: R L
authors.initials: RL
authors.lastname: Obendorf
authors.forename: K J
authors.initials: KJ
authors.lastname: Steadman
authors.forename: D J
authors.initials: DJ
authors.lastname: Fuller
authors.forename: M
authors.initials: M
authors.lastname: Horbowicz
authors.forename: B A
authors.initials: BA
authors.lastname: Lewis
mesh_terms: 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
chemical_list: D004187:Disaccharides; C424842:fagopyritol A1; C112483:fagopyritol B1