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Two New Triterpene Lactones from the Stems of Kadsura polysperma
Author(s) -
Jia Zhengwei,
Lu Yan,
Liao Zhixin,
Chen Daofeng
Publication year - 2007
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.200790124
Subject(s) - chemistry , triterpene , stereochemistry , ring (chemistry) , terpene , organic chemistry , medicine , alternative medicine , pathology
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 2D‐NMR and HR‐MS techniques. The configuration of 1 was confirmed by X‐ray analysis. Compounds 2 and 3 are members of a rare class of 3,4‐secolanostane metabolites with ring‐expanded or cyclized structures, respectively.