| Literature DB >> 17507003 |
Ewa Ciepichal1, Jacek Wojcik, Tomasz Bienkowski, Magdalena Kania, Malgorzata Swist, Witold Danikiewicz, Andrzej Marczewski, Jozefina Hertel, Zdzislaw Matysiak, Ewa Swiezewska, Tadeusz Chojnacki.
Abstract
A novel type of polyprenols, alloprenols, with an alpha-trans-isoprenoid unit was found in the leaves of Allophylus caudatus (Sapindaceae) besides typical alpha-cis-polyprenols. The polyprenol family (Prenol-11-13, Prenol-12 dominating) was accompanied by traces of dolichols of the same chain-length. Prenol alpha-cis- and alpha-trans-isomers were chromatographically separated and their structure was analyzed by HPLC/ESI-MS, HR-ESI-MS and 1H and 13C NMR spectroscopy. Model compounds, semi-synthetic alpha-isomers of all-trans-Pren-9 and mainly-cis-Pren-11, were obtained using an oxidation-reduction procedure. Comparison of their NMR spectra confirmed the structure of the newly identified polyprenols. The observed pattern of NMR signal shifts may be applied for elucidation of isoprenoid structure.Entities:
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Year: 2007 PMID： 17507003 DOI： 10.1016/j.chemphyslip.2007.04.002
Source DB: PubMed Journal: Chem Phys Lipids ISSN： 0009-3084 Impact factor: 3.329