Absolute configuration of resveratrol oligomer glucosides isolated from the leaves of Upuna borneensis. (June 2017)

• Record Type: Journal Article
• Authors: Ito, Tetsuro; Ito, Hiromi; Iinuma, Munekazu
• Is Part Of: Phytochemistry letters. Volume 20(2017:Jun.)
• Page Start: 26
• Page End: 31
• Publication Date: 2017-06
• Subjects: Upuna borneensis -- Dipterocarpaceae -- Resveratrol oligomer -- Absolute configuration; Botanical chemistry -- Periodicals; Chimie végétale -- Périodiques; 572.205
• DOI: 10.1016/j.phytol.2017.03.006
• Languages: English
• ISSNs: 1874-3900

Abstract

Graphical abstract: Highlights: Resveratrol oligomers was isolated from Upuna borneensis . Absolute configurations were determined based on NMR and CD spectral properties. Occurrence of O -glucosides bearing an epimeric aglycone of resveratrol pentamers were exhibited. Abstract: A comprehensive investigation of the chemical constituents of the leaves of Upuna borneensis (Dipterocarpaceae) was performed. Three new glucosides of resveratrol oligomers having a pentameric aglycone [upunoside E (1 )] and dimeric aglycones [upunosides F (3 ) and G (4 )], as well as 14 resveratrol derivatives (2, 5 –17 ), were isolated. The absolute configurations of the new compounds were elucidated by spectroscopic analysis, including two-dimensional NMR and CD spectra.