Structural Studies on New, Non-reducing Oligosaccharides Produced by Rhizobium meliloti J7017

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Three non-reducing oligosaccharides were isolated from the fraction of cyclic (1→2)-β-Dglucan of Rhizobium meliloti J7017 by reversed-phase chromatography and paper chromatography. Methylation and ¹H-NMR analyses indicated that they were α-D-glucopyranosyl α-kojitrioside, α-D-glucopyranosyl α-kojitetraoside, and α-D-glucopyranosyl α-kojipentaoside.