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Start Over Author "SI, Xiang" Journal journal of asian natural products research
9 results on '"SI, Xiang"'

1. Three new triterpene saponins fromClematis chinensis

Author

Ke Zan, Yong Jiang, Qiang Fu, Peng-Fei Tu, Shepo Shi, Ming-Bo Zhao, and Si-Xiang Zhou

Subjects
Pharmacology, chemistry.chemical_classification, Molecular Structure, Traditional medicine, Terpenes, Organic Chemistry, Pharmaceutical Science, General Medicine, Saponins, Plant Roots, Triterpenes, Analytical Chemistry, Rhizome, Hydrolysis, Complementary and alternative medicine, Triterpene, chemistry, Drug Discovery, Molecular Medicine, Clematis chinensis, Nuclear Magnetic Resonance, Biomolecular, Two-dimensional nuclear magnetic resonance spectroscopy, Clematis, Drugs, Chinese Herbal
Abstract

Three new triterpene saponins, clematochinenosides H-J (1-3), were isolated from the roots and rhizomes of Clematis chinensis. Their structures were elucidated on the basis of spectroscopic means including 1D and 2D NMR experiments and hydrolysis products.

Published
2013

2. Prostaglandin-like fatty acid derivatives fromArtemisia anomala

Author

Peng-Fei Tu, Si-Xiang Zhou, Ke Zan, Qiang Fu, and Xiao-Qing Chen

Subjects
Pharmacology, Folk medicine, biology, Chemistry, Stereochemistry, Organic Chemistry, food and beverages, Pharmaceutical Science, Prostaglandin, General Medicine, Pharmacognosy, biology.organism_classification, Analytical Chemistry, chemistry.chemical_compound, Complementary and alternative medicine, Biochemistry, Drug Discovery, Molecular Medicine, Artemisia, Artemisia anomala, Fatty acid derivatives
Abstract

Four prostaglandin-like fatty acid derivatives anomalone A-D (1-4) were isolated from the aerial part of Artemisia anomala S. Moore. Their structures were determined on the basis of extensive spectroscopic analyses.

Published
2010

3. Prostaglandin-like fatty acid derivatives from Artemisia anomala

Author

Ke, Zan, Si-Xiang, Zhou, Xiao-Qing, Chen, Qiang, Fu, and Peng-Fei, Tu

Subjects
Artemisia, Molecular Structure, Prostaglandins, Nuclear Magnetic Resonance, Biomolecular, Drugs, Chinese Herbal
Abstract

Four prostaglandin-like fatty acid derivatives anomalone A-D (1-4) were isolated from the aerial part of Artemisia anomala S. Moore. Their structures were determined on the basis of extensive spectroscopic analyses.

Published
2010

4. Triterpene saponins from the leaves of Ilex kudingcha

Author

Peng-Fei Tu, Yong Jiang, Xiao-Ming Tian, Si-Xiang Zhou, and Li Tang

Subjects
Stereochemistry, Chemical structure, Saponin, Pharmaceutical Science, Pharmacognosy, Ilex, Analytical Chemistry, Triterpene, Drug Discovery, Nuclear Magnetic Resonance, Biomolecular, Triterpenoid saponin, Pharmacology, chemistry.chemical_classification, Molecular Structure, Chemistry, Organic Chemistry, Glycoside, Stereoisomerism, General Medicine, Saponins, Terpenoid, Triterpenes, Plant Leaves, Complementary and alternative medicine, Molecular Medicine, Lactone, Drugs, Chinese Herbal
Abstract

Three new triterpene saponins, ilekudinosides T-V (1-3), along with six known saponins were isolated from the 70% ethanolic extract of the leaves of Ilex kudingcha. The new saponins were characterized as 3-O-beta-d-glucopyranosyl-(1 --3)-[alpha-l-rhamnopyranosyl-(1 --2)]-alpha-l-arabinopyranosyl-3beta,19alpha-dihydroxy-urs-12(13)-en-28,20beta-lactone (1), 3-O-beta-d-glucopyranosyl-(1 --3)-[alpha-l-rhamnopyranosyl-(1 --2)]-alpha-l-arabinopyranosyl-3beta,19alpha-dihydroxy-12-ethoxy-urs-13(18)-ene-28,20beta-lactone (2), 3-O-beta-d-glucopyranosyl-(1 --3)-[alpha-l-rhamnopyranosyl-(1 --2)]-alpha-l-arabinopyranosyl-3beta,19alpha-dihydroxy-11-oxo-urs-13(18)-ene-28,20beta-lactone (3), respectively. The structures of compounds 1-3 were elucidated on the basis of the chemical and spectroscopic evidence, and the structures of known compounds were identified by comparison of their spectroscopic data with those reported in the literature.

Published
2010

8. Three new triterpene saponins from Clematis chinensis.

Author

Qiang Fu, Ke Zan, Ming-Bo Zhao, Si-Xiang Zhou, She-Po Shi, Yong Jiang, and Peng-Fei Tu

Subjects
CHROMATOGRAPHIC analysis, GLYCOSIDES, MASS spectrometry, MOLECULAR structure, NUCLEAR magnetic resonance spectroscopy, PHARMACEUTICAL chemistry, PLANT roots, PLANT stems, TERPENES, DESCRIPTIVE statistics
Abstract

Three new triterpene saponins, clematochinenosides H-J (1-3), were isolated from the roots and rhizomes of Clematis chinensis. Their structures were elucidated on the basis of spectroscopic means including 1D and 2D NMR experiments and hydrolysis products. [ABSTRACT FROM AUTHOR]

Published
2013
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9. Triterpene saponins from the leaves of Ilex kudingcha.

Author

Tang, Li, Jiang, Yong, Tian, Xiao-Ming, Zhou, Si-Xiang, and Tu, Peng-Fei

Subjects
SAPONINS, AQUIFOLIACEAE, ALCOHOLS (Chemical class), LEAVES, PLANT extracts
Abstract

Three new triterpene saponins, ilekudinosides T-V (1-3), along with six known saponins were isolated from the 70% ethanolic extract of the leaves of Ilex kudingcha. The new saponins were characterized as 3-O-β-d-glucopyranosyl-(1 → 3)-[α-l-rhamnopyranosyl-(1 → 2)]-α-l-arabinopyranosyl-3β,19α-dihydroxy-urs-12(13)-en-28,20β-lactone (1), 3-O-β-d-glucopyranosyl-(1 → 3)-[α-l-rhamnopyranosyl-(1 → 2)]-α-l-arabinopyranosyl-3β,19α-dihydroxy-12-ethoxy-urs-13(18)-ene-28,20β-lactone (2), 3-O-β-d-glucopyranosyl-(1 → 3)-[α-l-rhamnopyranosyl-(1 → 2)]-α-l-arabinopyranosyl-3β,19α-dihydroxy-11-oxo-urs-13(18)-ene-28,20β-lactone (3), respectively. The structures of compounds 1-3 were elucidated on the basis of the chemical and spectroscopic evidence, and the structures of known compounds were identified by comparison of their spectroscopic data with those reported in the literature. [ABSTRACT FROM AUTHOR]

Published
2009
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