| Literature DB >> 14559273 |
Christine Kamperdick1, Nguyen Minh Phuong, Günter Adam, Tran Van Sung.
Abstract
From the leaves of Xylopia vielana (Annonaceae) two dimeric guaianes named vielanins D and E were isolated and structurally elucidated by mass and NMR spectroscopy. Vielanin D and E consist of bridged ring systems formally representing the Diels-Alder products from the hypothetical guaiane-type monomers. Due to a hemiketal function at C-8' both compounds occurred as epimeric mixtures.Entities:
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Year: 2003 PMID： 14559273 DOI： 10.1016/j.phytochem.2003.08.003
Source DB: PubMed Journal: Phytochemistry ISSN： 0031-9422 Impact factor: 4.072