| Literature DB >> 11249097 |
C Kamperdick1, N M Phuong, T Van Sung, G Adam.
Abstract
From the leaves of Xylopia vielana (Annonaceae) the three dimeric guaianes vielanin A-C were isolated and structurally elucidated by mass and NMR spectroscopy as 1-3. The structure of 1 contains a bridged ring system formed probably via a Diels-Alder reaction of two different guaiane monomers. Compounds 2 and 3 represent symmetric cyclobutanes formally generated from two equal guaiane moieties by [2 + 2] cycloaddition.Entities:
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Year: 2001 PMID： 11249097 DOI： 10.1016/s0031-9422(00)00344-7
Source DB: PubMed Journal: Phytochemistry ISSN： 0031-9422 Impact factor: 4.072