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1: Phytochemistry. 2001 Feb;56(4):335-40.Click here to read Links

Guaiane dimers from Xylopia vielana.

Kamperdick C, Phuong NM, Van Sung T, Adam G.

Institute of Plant Biochemistry, Weinberg 3, Halle/Saale, Germany.

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.

PMID: 11249097 [PubMed - indexed for MEDLINE]

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