Eucophylline, a Tetracyclic Vinylquinoline Alkaloid from Leuconotis eugenifolius

Deguchi J 1 , Shoji T , Nugroho AE , Hirasawa Y , Hosoya T , Shirota O Show all authors , Awang K , Hadi AH , Morita H

Affiliations 

  • 1 Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa, Tokyo 142-8501, Japan
J Nat Prod, 2010 Oct 22;73(10):1727-9.
PMID: 20836516 DOI: 10.1021/np100458b

Abstract

Eucophylline (1), a new tetracyclic vinylquinoline alkaloid, was isolated from the bark of Leuconotis eugenifolius together with leucophyllidine (2). The structure and absolute configuration of 1 were elucidated on the basis of 2D NMR correlations and simulated CD analysis. Leucophyllidine (2) showed iNOS inhibitory activity and decreased the iNOS protein expression dose-dependently.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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