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Two Novel Resveratrol Trimers from Dipterocarpus grandiflorus

✍ Scribed by Tetsuro Ito; Naohito Abe; Masayoshi Oyama; Toshiyuki Tanaka; Jin Murata; Dedy Darnaedi; Munekazu Iinuma

Publisher
John Wiley and Sons
Year
2009
Tongue
German
Weight
355 KB
Volume
92
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

magnified image

Two new resveratrol (=5‐[(E)‐2‐(4‐hydroxyphenyl)ethenyl]benzene‐1,3‐diol) trimers, grandiphenols C (1) and D (2), were isolated from the stem of Dipterocarpus grandiflorus (Dipterocarpaceae). The structures of 1 and 2 were elucidated by spectral analysis including 1D‐ and 2D‐NMR experiments and by computer‐aided molecular modeling. The NMR characteristics caused by the steric hindrance and the biogenetic relationship of the isolates are also discussed in this work.

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