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Occurrence of Stilbene Glucosides in Upuna borneensis
Author(s) -
Ito Tetsuro,
Ali Zulfiqar,
Iliya Ibrahim,
Furusawa Miyuki,
Tanaka Toshiyuki,
Nakaya Kenichi,
Takahashi Yoshikazu,
Sawa Ryuichi,
Murata Jin,
Darnaedi Dedy,
Iinuma Munekazu
Publication year - 2005
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.200490293
Subject(s) - chemistry , aglycone , glucoside , dipterocarpaceae , pentamer , stereochemistry , glycoside , botany , biochemistry , medicine , alternative medicine , pathology , biology
Four new stilbene glucosides, upunosides A ( 1 ), B ( 5 ), C ( 6 ), and D ( 7 ), were isolated from the stem of Upuna borneensis (Dipterocarpaceae) together with the three known glucosides 3, 4 , and 8 . Upunoside A ( 1 ) is the first natural instance of a glucoside of a resveratrol pentamer, and its aglycone has a dibenzo‐fused bicyclo[5.3.0]octadiene and two dihydrobenzofuran moieties. The relative structure of the aglycone was determined by spectral analysis including 1D and 2D NMR experiments.