Abstract
The new natural phenolics, 3,6-di-
O-caffeoylglucose, 1-
O-caffeoylxylose and 2,3-
O-hexahydroxydiphenoyl-4,6-
O-sanguisorboyl-(α/β)-
4C
1-glucopyranose have been isolated and fully characterized from
Rubus sanctus Schreb.
The new natural caffeoyl esters, 3,6-di-
O-caffeoyl-(α/β)-glucose and 1-
O-caffeoyl-β-xylose, together with the hitherto unknown natural tannin, 2,3-O-hexahydroxydiphenoyl-4,6-
O-sanguisorboyl-(α/β)-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.