Structure Elucidation of Biflavones With Ether Bonds by NMR‐Spectroscopy—Structure Revisions of Loniflavone and Methylloniflavone
For the structure elucidation of biflavones in which the subunits are linked by an ether bridge, two NMR spectroscopic approaches are shown to determine the position of the ether bridge, without derivatization of the compound. We show that the structures of the biflavones loniflavone and methylloniflavone, isolated from the leaves of Lonicera japonica Thunb. (Caprifoliaceae), have to be revised to ochnaflavone and methylochnaflavone, respectively.
Authors
- Franz Bučar (ORCID: https://orcid.org/0000-0002-7417-616X)
- L. D. Haas
- Eva‐Maria Pferschy‐Wenzig (ORCID: https://orcid.org/0000-0001-8327-0732)
- Fabian Alperth (ORCID: https://orcid.org/0000-0002-9716-1665)
- Klaus Zangger (ORCID: https://orcid.org/0000-0003-1682-1594)
- Olaf Kunert (ORCID: https://orcid.org/0000-0002-7091-5973)
Institutions
- University of Graz (AT)
- Research Center Pharmaceutical Engineering (Austria) (AT)
Publication Details
- Journal
- Magnetic Resonance in Chemistry
- Published
- 2025-11-10
- DOI
- https://doi.org/10.1002/mrc.70058
- Primary Topic
- Biological Activity of Diterpenoids and Biflavonoids
- Type
- article
- Field-Weighted Citation Impact
- 0.00