Pyrrolizidine alkaloids from Onosma arenaria (Boraginaceae)
Uplandicine, a 1,2-unsaturated pyrrolizidine alkaloid esterified with acetyl and echimidinyl moieties at C-7 and C-9, respectively, was isolated as a major component from the alkaloid extract of Onosma arenaria. Its structure was confirmed by MS (EI and positive FAB), 1H- and 13C-NMR analysis. Furth...
Gespeichert in:
| Hauptverfasser: | , , |
|---|---|
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2003
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| In: |
Biochemical systematics and ecology
Year: 2003, Jahrgang: 31, Heft: 5, Pages: 477-485 |
| ISSN: | 1873-2925 |
| DOI: | 10.1016/S0305-1978(02)00177-1 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1016/S0305-1978(02)00177-1
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| Verfasserangaben: | Assem El-Shazly, Afaf Abdel-Ghani, Michael Wink |
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| 520 | |a Uplandicine, a 1,2-unsaturated pyrrolizidine alkaloid esterified with acetyl and echimidinyl moieties at C-7 and C-9, respectively, was isolated as a major component from the alkaloid extract of Onosma arenaria. Its structure was confirmed by MS (EI and positive FAB), 1H- and 13C-NMR analysis. Furthermore, nine minor alkaloids were identified on the basis of mass spectral data and/or Kovats retention indices. | ||
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