Die Plant Science Student Conference (PSSC) wird seit 20 Jahren im jährlichen Wechsel von Studierenden der beiden Leibniz-Institute IPK und IPB organisiert. Im Interview erläutern Christina Wäsch (IPK) und Carolin Apel (IPB),…
Über 600 Gäste kamen am 4. Juli ans IPB zur Langen Nacht, die Wissen schafft, um bei unserem Wissenschafts-Quiz-Parcours viel Neues zu erfahren und ihre Kenntnisse unter Beweis zu stellen. Unser Programm in diesem Jahr…
Four β-carboline alkaloids, brunneins A–C (1–3) and 3-(7-hydroxy-9H-β-carboline-1-yl)propanoic acid (4), were isolated from fruiting bodies of the agaricoid fungus Cortinarius brunneus. The structures of 1–3 were determined by analysis of NMR and MS data, and the structure of compound 4 was determined by comparison with published data. Brunnein A (1) exhibited very low cholinesterase inhibitory effects and no cytotoxicity.
Publikation
Iranshahi, M.; Shaki, F.; Mashlab, A.; Porzel, A.; Wessjohann, L. A.;Kopetdaghins A−E, Sesquiterpene Derivatives from the Aerial Parts and the Roots of Dorema kopetdaghenseJ. Nat. Prod.701240-1243(2007)DOI: 10.1021/np070043u
Three new sesquiterpene derivatives, kopetdaghins A−C (1−3), one known prenylated coumarin (7), and two known steroid glucosides, sitosterol 3-O-glucoside and stigmasterol 3-O-glucoside, were isolated from the aerial parts of Dorema kopetdaghense. In addition, two new sesquiterpene derivatives, kopetdaghin D (4) and kopetdaghin E (5), together with kopetdaghins A−C and one known sesquiterpene coumarin (6), were isolated from the roots of the plant. The structures of these compounds were elucidated by various 1D and 2D NMR techniques as well as high-resolution positive-ion ESIMS.