Abstract
The new natural caffeoyl esters, 3,6-di-O-caffeoyl-(alpha/beta)-glucose and 1-O-caffeoyl-beta-xylose, together with the hitherto unknown natural tannin, 2,3-O-hexahydroxydiphenoyl-4,6-O-sanguisorboyl-(alpha/beta)-glucose, have been isolated from the aqueous alcohol aerial part extract of Rubus sanctus. Establishment of all structures was based on the chemical and spectral evidence, including ESI-MS and 2D NMR.
MeSH terms
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Caffeic Acids / chemistry*
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Carbohydrate Conformation
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Esters / chemistry*
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Esters / isolation & purification
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Glucose / analogs & derivatives
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Hydrolyzable Tannins*
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Molecular Structure
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Nuclear Magnetic Resonance, Biomolecular
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Plants, Medicinal / chemistry
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Rosaceae / chemistry*
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Spectrophotometry, Ultraviolet
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Tannins / chemistry*
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Tannins / isolation & purification
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Xylose / analogs & derivatives
Substances
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Caffeic Acids
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Esters
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Hydrolyzable Tannins
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Tannins
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ellagitannin
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Xylose
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Glucose