Caffeoyl sugar esters and an ellagitannin from Rubus sanctus |
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Authors: | Hussein Sahar A M Ayoub Nahla A Nawwar Mahmoud A M |
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Affiliation: | National Research Center, Dokki, Cairo, Egypt. |
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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. |
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Keywords: | Rubus sanctus Rosaceae Caffeoyl esters 3,6-di-O-caffeoyl-(α/β)-glucose 1-O-caffeoyl-β-xylose Tannin 2,3-O-hexahydroxydiphenoyl-4,6-O-sanguisorboyl-(α/β)-glucose ESI-MS 2D NMR |
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