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Two New Triterpene Lactones from the Stems of Kadsura polysperma

โœ Scribed by Zhengwei Jia; Yan Lu; Zhixin Liao; Daofeng Chen

Publisher
John Wiley and Sons
Year
2007
Tongue
German
Weight
101 KB
Volume
90
Category
Article
ISSN
0018-019X

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โœฆ Synopsis

Abstract

Two new triterpene lactones, polysperlactones A (2) and B (3), were isolated from the stems of Kadsura polysperma, together with the known compounds heteroclitalactone D (1) and schisanlactone E (4). Their structures were elucidated by spectroscopic methods, including 2Dโ€NMR and HRโ€MS techniques. The configuration of 1 was confirmed by Xโ€ray analysis. Compounds 2 and 3 are members of a rare class of 3,4โ€secolanostane metabolites with ringโ€expanded or cyclized structures, respectively.

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## Abstract Three new dibenzocyclooctaneโ€type lignans, kadsutherins Aโ€“C (**1**โ€“**3**), were isolated from the stems of two __Kadsura__ species. Their structures and configurations were elucidated by spectroscopic methods including 2Dโ€NMR and HRโ€MS techniques. Kadsutherin C (**3**) is the first dibe