C18 dibenzocyclooctadiene lignans from Kadsura philippinensis

Ya Ching Shen, Chia Ching Liaw, Yuan Bin Cheng, Atallah F. Ahmed, Mei Chou Lai, Shorong Shii Liou, Tian-Shung Wu, Yao Haur Kuo, Yu Chi Lin

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26 Citations (Scopus)

Abstract

Four new C18 dibenzocyclooctadiene lignans, kadsuphilins A (1) and B (3), 6-epi-gomisin (2), and 1-demethylkadsuphilin A (4), along with eight known related metabolites, were isolated from an EtOAc fraction of an alcoholic extract of the aerial parts of Kadsura philippinensis growing in Taiwan. The structures of 1-4 were elucidated on the basis of spectroscopic analyses, including 2D NMR (HMQC, HMBC, and NOESY) experiments, and by comparison of their spectroscopic data with those of related metabolites. The configurations of the biphenyl and cyclooctadiene moieties were deduced from circular dichroism (CD) and NOESY NMR spectra, respectively. Some of the compounds showed radical-scavenging activity in a DPPH-HPLC method.

Original languageEnglish
Pages (from-to)963-966
Number of pages4
JournalJournal of Natural Products
Volume69
Issue number6
DOIs
Publication statusPublished - 2006 Jun 1

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Molecular Medicine
  • Pharmacology
  • Pharmaceutical Science
  • Drug Discovery
  • Complementary and alternative medicine
  • Organic Chemistry

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