Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Günter Willuhn"'
Publikováno v:
Planta Medica. 70:967-977
From the flowerheads of Arnica lonchophylla Greene ssp. lonchophylla Maguire (Asteraceae), a variety of mono-, di- and trihydroxytriterpenes of the oleanane, ursane, lupane and dammarane types were isolated and their structures elucidated by EI and C
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8bea5b5c139a13e10637386d8dae09b0
https://doi.org/10.1055/s-2004-832624
https://doi.org/10.1055/s-2004-832624
Publikováno v:
Planta Medica. 66:678-681
An investigation of sesquiterpene lactone content in Arnica tincture (German Pharmacopoeia) after storage for three years at different temperatures (+4, +25 and +30 degrees C) was carried out by GC and GC-MS analysis. A decrease (13, 32 and 37%, resp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2fdec18fa9eb20c58cdc9672d516a46d
https://doi.org/10.1055/s-2000-8635
https://doi.org/10.1055/s-2000-8635
Publikováno v:
Phytochemistry. 51:979-986
From the aerial parts of Melampodium divaricatum (Rich. in Pers.) DC, Asteraceae, four new doubly and eight new triply acylated 2-hydroxythymol 3-O-β- d -fucopyranosyl- (1→3)-β- d -fucopyranosides (seven compounds) and 2-hydroxythymol 3-O-β- d -
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f47fd2051069c0c25d9eda2a30186f18
https://doi.org/10.1016/s0031-9422(98)00700-6
https://doi.org/10.1016/s0031-9422(98)00700-6
Publikováno v:
Tetrahedron. 55:2997-3006
A novel, unusual terpenoid compound was found as one of the main constituents in Arnica sachalinensis (Asteraceae). Its structure was established by NMR spectroscopic studies including COSY, HMQC, HMBC, and DEPT-135 experiments as a dimeric thymol de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6033388a92d75dac29a991bf4981f502
https://doi.org/10.1016/s0040-4020(99)00083-6
https://doi.org/10.1016/s0040-4020(99)00083-6
Publikováno v:
Planta Medica. 64:635-639
In addition to the helenanolide and xanthanolide type sesquiterpene lactones previously isolated from A. longifolia D.C. Eaton, we report on 13 further sesquiterpene lactones (7 helenanolides, 1 xanthanolide, 3 1,5-trans-guaianolides, 1 1,5-cis-guaia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e8026bfc32c2cc60f16c028ccf9abcf0
https://doi.org/10.1055/s-2006-957537
https://doi.org/10.1055/s-2006-957537
Publikováno v:
Phytochemistry. 49:777-781
The new thymol derivatives, 10-acetoxy-9-chloro-8,9-dehydrothymol, 10-acetoxy-8,9-dehydrothymol, 10-isobutyryloxy-8,9-dehydrothymol and 9-acetoxy-thymol, were isolated from flowerheads of Arnica sachalinensis and identified by their mass and NMR spec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f46f5a3c0569cf08b0ecf770da5b0e6
https://doi.org/10.1016/s0031-9422(98)00242-8
https://doi.org/10.1016/s0031-9422(98)00242-8
Publikováno v:
Phytochemistry. 45:1529-1532
A new di- C -glucosylflavone, 2″2‴-di- O -β-glucopyranosyl-vicenin II and a new flavonol di- O -glycoside, herbacetin 3- O -α-rhamnopyranoside-8- O -β-glucopyranoside, were isolated from the aerial parts of Ephedra aphylla . Vicenin II, the 7-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f57f5e7f8c96bf2c3856b7ce5a1726b9
https://doi.org/10.1016/s0031-9422(97)00092-7
https://doi.org/10.1016/s0031-9422(97)00092-7
Publikováno v:
Planta Medica. 61:544-550
From flowerheads of Arnica angustifolia ssp. attenuata nine helenanolides, two 1,5- trans-guaianolides, and a mixture of inositol-tetraesters were isolated. Five of the helenanolides are described for the first time. One of them, 4- O-tigloylarnicalp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::966fd885f391bce04afa317bd370640f
https://doi.org/10.1055/s-2006-959368
https://doi.org/10.1055/s-2006-959368
Publikováno v:
Phytochemistry. 40:1213-1218
From flowerheads of Arnica angustifolia ssp. attenuata the labdane diterpenes labd-13(Z)-ene-8α,15-diol (main component) and (13R,14R)8,13-epoxylabdane-14,15-diol were isolated and their structures established by extensive NMR and MS measurements. B
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e16fc87d28f60414ce9ee95447284a1a
https://doi.org/10.1016/0031-9422(95)00304-p
https://doi.org/10.1016/0031-9422(95)00304-p
Autor:
Claus M. Passreiter, Günter Willuhn, Awt Konings, Thomas J. Schmidt, W van Uden, Irmgard Merfort, Niesko Pras, Herman J. Woerdenbag
Publikováno v:
ResearcherID
Phytomedicine, 2(2), 127-132
Phytomedicine, 2(2), 127-132
The effect of the flavones apigenin, luteolin, hispidulin and eupafolin, and of the flavonols kaempferol, quercetin, 6-methoxykaempferol and patuletin from Amica spp, on the cytotoxicity of the sesquiterpene lactone helenalin was studied in the human
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::714c88261145f22f1fcf5bfb4770d721
https://pubmed.ncbi.nlm.nih.gov/23196154
https://pubmed.ncbi.nlm.nih.gov/23196154