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New Oxygenated Lignans from Kadsura philippinensis

✍ Scribed by Ya-Ching Shen; Yu-Chi Lin; Yuan-Bin Cheng; Chia-Ju Chang; Ting-Wei Lan; Shorong-Shii Liou; Ching-Te Chien; Chia-Ching Liaw; Ashraf Taha Khalil

Publisher
John Wiley and Sons
Year
2008
Tongue
German
Weight
220 KB
Volume
91
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Seven new oxygenated lignans, kadsuphilins G–M (1–7, resp.), were isolated by chromatographic fractionation of an AcOEt extract of the aerial part of Kadsura philippinensis including four compounds with a dibenzocyclooctadiene skeleton, two with a bicyclooctane ring system, and one of 1,4‐biphenyldimethylbutane type. The structures of the isolated compounds were elucidated through extensive spectroscopic analyses, particularly 2D‐NMR experiments (HMQC, HMBC, and NOESY). The configuration of the chiral centers and the biphenyl moiety were determined by NOESY as well as CD spectroscopy, respectively.

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