Abstract
<p> Chemotaxonomic analysis of kōwhai leaf extracts in New Zealand are limited with previous reports of <em> Sophora tetraptera </em> having a flavonoid profile distinct from <em> S. microphylla </em> sensu lato and <em> S. prostrata </em> . Eight <em> Sophora </em> species are now recognised in New Zealand: <em> S. chathamica </em> , <em> S. fulvida, S. godleyi, S. longicarinata, </em> <em> S. microphylla, S. molloyi, S. prostrata </em> and <em> S. tetraptera </em> . We now report liquid chromatography-ultraviolet-mass spectrometry (LC-UV-MS) analyses of leaf and seed extracts of individual plants (2–16) from each of these eight species, plus the Chilean <em> S. cassioides </em> . All of the <em> S. tetraptera </em> leaf extracts had similar LC-UV-MS profiles, different from all of the other <em> Sophora </em> samples, consisting of four predominant compounds, characterised by MS and nuclear magnetic resonance (NMR) spectroscopy as: luteolin-7-O-rutinoside <strong> 1, </strong> luteolin-7-O-glucoside <strong> 2, </strong> apigenin-7-O-rutinoside <strong> 3, </strong> and apigenin-7-O-glucoside <strong> 4. </strong> The other <em> Sophora </em> leaf extracts showed complex flavonoid compositions, with no clear distinction between species. Most of the <em> Sophora </em> seed samples, including those of <em> S. tetraptera </em> , showed one major phenolic compound, but a few had a related compound. These were purified and characterised by MS and NMR spectroscopy as 3′ ,4′ ,7-trihydroxyisoflavone <strong> 5 </strong> (in most seeds) and its 7-O-glucoside <strong> 6 </strong> (in a few seeds), neither of which has been previously reported from these <em> Sophora </em> species.</p>
Original language | American English |
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Pages (from-to) | 227-236 |
Number of pages | 10 |
Journal | Chemistry and Biochemistry Faculty Publications and Presentations |
Volume | 56 |
Issue number | 3 |
DOIs | |
State | Published - 1 Sep 2018 |
Keywords
- Fabaceae
- chathamica
- fulvida
- godleyi
- longicarinata
- microphylla
- cassioides
- molloyi
- prostrata
- tetraptera
EGS Disciplines
- Chemistry