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Publikation

Arnold, N.; Schmidt, J.; Kuhnt, C.; Wessjohann, L.; Lukten hos naftalinskinnet, Scytinostroma portentosum Svensk Mykologisk Tidskrift 28, 49-53, (2007)

The naphthalene-like smell of Scytinostroma portentosum (Berk. & Curt.) Donk originates predominantly from indole (1) together with 3-chloroindole (3) and to a lesser extent of 1-octen-3-ol (9). Naphthalene (8) itself could not be detected.
Publikation

Anh, N. T. H.; Sung, T. V.; Arnold, N.; Wessjohann, L.; Chemical constituents of Zizyphus sativa Gaertn fruits. Part III - Alkaloids Vietnam J. Chem. 45, 237-240, (2007)

Two alkaloids have been isolated from Z. sativa fruits besides butane-2,3-diol and glycerol. The structures of alkaloids were established as stepharine and 1,2-dimethoxy,5,6,6a,7-tetrahydro-4H-dibenzo-quinoline by using MS, NMR spectroscopic data and by comparison with reported data.
Publikation

Anh, N. T. H.; Sung, T. V.; Wessjohann, L.; Chemical constituents of Zizyphus sativa Gaertn fruits. Part II - Triterpenoid acid Vietnam J. Chem. 45, 110-113, (2007)

Three terpenoid acids have been isolated from an ethyl acetate extract of Z. sativa fruits. Their structures were established as betulinic, oleanolic and maslinic acids by means of MS, NMR spectroscopic data and by comparison with reported data.
Publikation

Topçu, G.; Herrmann, G.; Kolak, U.; Gören, C.; Porzel, A.; Kutchan, T. M.; Isolation of fatty acids and aromatics from cell suspension cultures of Lavandula angustifolia Nat. Prod. Res. 21, 100-105, (2007) DOI: 10.1080/14786410500462884

Cell suspension cultures of Lavandula angustifolia Mill. ssp. angustifolia (syn.: L. officinalis Chaix.) afforded a fatty acid composition, cis and trans p-coumaric acids (=p-hydroxy cinnamic acids), and β-sitosterol. The fatty acid composition was analyzed by GC-MS, and the structures of the isolated three compounds were determined by 1H- and 13C-NMR, and MS spectroscopic techniques.
Publikation

Thuy, T. T.; Sung, T. V.; Franke, K.; Wessjohann, L.; Study on chemical composition of the seeds of Zizyphus Jujuba Mill var. Spinosa Hu Tap chi Duoc lieu 12, 11-13, (2007)

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Publikation

Thuy, T. T.; Sung, T. V.; Franke, K.; Arnold, N.; Wessjohann, L.; Flavonone-C-glycosides from the seeds of Zizyphus Jujuba Mill var. Spinosa Hu Vietnam J. Chem. 1-8, (2007)

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Publikation

Teichert, A.; Schmidt, J.; Porzel, A.; Arnold, N.; Wessjohann, L.; Brunneins A–C, β-Carboline Alkaloids from Cortinarius brunneus J. Nat. Prod. 70, 1529-1531, (2007) DOI: 10.1021/np070259w

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

Khine, M. M.; Arnold, N.; Franke, K.; Porzel, A.; Schmidt, J.; Wessjohann, L.; Phytoconstituents from the root of Streptocaulon tomentosum and their chemotaxonomical relevance for separation from S. juventas Biochem. Syst. Ecol. 35, 517-524, (2007) DOI: 10.1016/j.bse.2007.01.006

A new cardenolide, 17β-H-periplogenin-3-O-β-d-digitoxoside (1), and a new pregnane glycoside, Δ5-pregnene-3β,16α-diol-d-O-[2,4-O-diacetyl-β-digitalopyranosyl-(1 → 4)-β-d-cymaropyranoside]-16-O-[β-d-glucopyranoside] (2) were isolated from the roots of Streptocaulon tomentosum (Asclepiadaceae) together with a series of known compounds. Their chemotaxonomic significance for the separation of S. tomentosum from Streptocaulon juventas is discussed, suggesting a rather clear distinction of these species.
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 kopetdaghense J. Nat. Prod. 70, 1240-1243, (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.
Publikation

Giacomelli, S.; Maldaner, G.; Stücker, C.; Marasciulo, C.; Schmidt, J.; Wessjohann, L.; Dalcol, I.; Morel, A.; Triterpenoids from Gouania ulmifolia Planta Med. 73, 499-501, (2007) DOI: 10.1055/s-2007-967166

Two new triterpenoids, named gouanic acid A (1) and gouanic acid B (2), were isolated from the aerial parts of Gouania ulmifolia, along with six known compounds. The structures of the new compounds were determined by spectroscopic methods, mainly NMR (1D and 2D) and mass spectrometry. The new compounds did not show significant antimicrobial activities.
  • Die Leibniz-Gemeinschaft
  • Digitalisierung in der Landwirtschaft
  • Martin-Luther Universität Halle
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