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Your search keyword '"Luo-shan, Xu"' showing total 5 results
Start Over Author "Luo-shan, Xu" Journal phytochemistry
5 results on '"Luo-shan, Xu"'

1. Sesquiterpene lactones from Ixeris sonchifolia

Author

Zheng-Tao Wang, Ji-Yuan Ma, Luo-Shan Xu, Tsuneo Namba, Guo-Jun Xu, and Shigetoshi Kadota

Subjects
chemistry.chemical_classification, Folk medicine, Ixeris, biology, Stereochemistry, Plant Science, General Medicine, Horticulture, Sesquiterpene, biology.organism_classification, Biochemistry, chemistry.chemical_compound, chemistry, Molecular Biology, Lactone
Abstract

The whole plant of Ixeris sonchifolia afforded two new guaianolide sesquiterpene lactones named 8-desoxyartelin [3-hydroxy-1(10),3-guaiadiene-12,6-olide-2-one] and ixerin Z [1(10),3,11(13)-guaiatriene-12,6-olide-2-one-3- O -glucopyranoside], along with the known compound 9α-hydroxyzaluzalin C, whose structure and stereochemistry wee determined by spectroscopic methods.

Published
1998
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2. Bi-bicyclic and bi-tricyclic compounds from Dendrobium thyrsiflorum

Author

Guang-Nong Zhang, Ying-Li Guo, Mian Zhang, Zheng-Tao Wang, Chaofeng Zhang, S. W. Annie Bligh, Ling-Yan Zhong, and Luo-Shan Xu

Subjects
Stereochemistry, Diol, Hydrocarbons, Cyclic, Plant Science, Horticulture, Mass spectrometry, Biochemistry, HeLa, chemistry.chemical_compound, Cell Line, Tumor, Animals, Humans, Benzofuran, Molecular Biology, Bicyclic molecule, biology, Molecular Structure, Plant Stems, Chemistry, General Medicine, biology.organism_classification, Coumarin, Antineoplastic Agents, Phytogenic, Dendrobium thyrsiflorum, Dendrobium, Two-dimensional nuclear magnetic resonance spectroscopy
Abstract

One bi-bicyclic and two bi-tricyclic derivatives of coumarin-benzofuran, phenanthrene-phenanthrene and phenanthrene-phenanthraquinone, along with seven known compounds, were isolated from stems of Dendrobium thyrsiflorum Rchb.f. (Orchidaceae). On the basis of chemical, NMR (1H, 13C, HMQC, HMBC and NOESY) and mass spectrometry data, their structures were elucidated as denthyrsin [3-(5',6'-dimethoxybenzofuran-2'-yl)-6,7-dimethoxy-2H-chromen-2-one; 1], denthyrsinol (4,5'-dimethoxy-[1,1']biphenanthrenyl-2,5,4',7'-tetraol; 2), and denthyrsinone (7,4',7'-trihydroxy-2,2',8'-trimethoxy-[5,1']biphenanthrenyl-1,4-dione; 3). Compounds 1-3 and denthyrsinin (1,5,7-trimethoxyphenanthrene-2,6-diol; 4) showed significant cytotoxic activities against Hela (13.5, 9.3, 9.9 and 2.7 microM, respectively), K-562 (0.45, 1.6, 6.0 and 2.3 microM, respectively) and MCF-7 (18.1, not tested, 3.5 and 4.8 microM, respectively) cell lines.

Published
2004

3. beta-Carboline alkaloids from hypodematium squamuloso-pilosum

Author

Rong-Han Zhou, Guo Jun Xu, Zheng-tao Wang, Luo Shan Xu, Tong Shui Zhou, Wen-Cai Ye, and Chun-Tao Che

Subjects
Stereochemistry, Alkaloid, Plant Science, General Medicine, Horticulture, Biology, biology.organism_classification, Biochemistry, Botany, heterocyclic compounds, Fern, Molecular Biology, Hypodematiaceae, Hypodematium
Abstract

A new beta-carboline alkaloid, 1-acetyl-8-hydroxy-beta-carboline, was isolated from the fern, Hypodematium squamuloso-pilosum, along with a known compound, 1-acetyl-beta-carboline. Their structures were elucidated from spectral evidence. This is the first report of this type of alkaloid being found in ferns.

Published
2001

4. A sesquiterpene lactone glucoside from Ixeris denticulata f. pinnatipartita

Author

Zheng-Tao Wang, Luo-Shan Xu, Guo-Jun Xu, and Ji-Yuan Ma

Subjects
Stereochemistry, Cell Survival, Flavonoid, Breast Neoplasms, Plant Science, Horticulture, Pharmacognosy, Sesquiterpene lactone, Sesquiterpene, Biochemistry, chemistry.chemical_compound, Lactones, Glucoside, Glucosides, Tumor Cells, Cultured, Humans, Molecular Biology, chemistry.chemical_classification, Flavonoids, Ixeris, Plants, Medicinal, biology, General Medicine, biology.organism_classification, Antineoplastic Agents, Phytogenic, Plant Leaves, chemistry, Female, Human breast, Sesquiterpenes, Lactone
Abstract

An extract from the entire Ixeris denticulata f. pinnatipartita plant afforded the guaianolide sesquiterpene lactone glucoside, 8 beta,15-dihydroxy-1(10),3,11(13)-guaiatrien-12,6-olide-15-O- glucopyranoside, along with the known flavonoids luteolin-7-O-glucoside and luteolin-7-O-glucuronide-6'-methyl ester; their structures were determined by spectroscopic methods. Ixerin Y inhibited the growth of human breast cancer MCF7 and MDA468 cell lines.

Published
1999

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