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Your search keyword '"Zhao, Niu"' showing total 5 results
Start Over Author "Zhao, Niu" Journal journal of asian natural products research
5 results on '"Zhao, Niu"'

1. A novel triterpenoid saponin from Polygala tenuifolia Willd

Author

Sheng-Xiu Xie, Dong-Ming Xu, Hong-Feng Zhao, Yu Li, Ya-Juan Xu, Tun-Hai Xu, Dong Han, Jian-Zhao Niu, Gang Lv, and Yun-Shan Si

Subjects
Polygala, Stereochemistry, Saponin, Pharmaceutical Science, Pharmacognosy, Plant Roots, Analytical Chemistry, Triterpene, Drug Discovery, Triterpenoid saponin, Pharmacology, chemistry.chemical_classification, Molecular Structure, biology, Organic Chemistry, Glycoside, General Medicine, Saponins, biology.organism_classification, Triterpenes, Terpenoid, Complementary and alternative medicine, chemistry, Polygala tenuifolia, Molecular Medicine, Polygalaceae
Abstract

A new triterpenoid saponin, tenuifoside A, was isolated together with three known triterpenoid saponins 2, 3, and 4 from the roots of Polygala tenuifolia Willd. With the help of chemical and spectral analyses (IR, MS, 1D-NMR, and 2D-NMR), the structure of the new saponin was elucidated as 3-O-beta-d-glucopyranosyl presenegenin 28-O-beta-d-xylopyranosyl-(1 --3)-beta-d-xylopyranosyl-(1 --4)-[beta-D-apiofuranosyl-(1 --3)]-alpha-L-rhamnopyranosyl-(1 --2)-[4-O-p-methoxycinnamoyl]-[alpha-l-rhamnopyranosyl-(1 --3)]-beta-d-fucopyranosyl ester (1). Three known triterpenoid saponins (2-4) were identified on the basis of spectroscopic data.

Published
2008

2. Two new triterpenoid saponins fromPulsatilla cernua(Thunb.) Bercht. et Opiz

Author

Shengxu Xie, Hong-Xun Li, Yu Li, Dong Han, Yun-Shan Si, Dong-Ming Xu, Ya-Juan Xu, Tun-Hai Xu, Hong-Feng Zhao, and Jian-Zhao Niu

Subjects
Spectrometry, Mass, Electrospray Ionization, Magnetic Resonance Spectroscopy, Molecular Sequence Data, Saponin, Pharmaceutical Science, Ranunculaceae, Pharmacognosy, Analytical Chemistry, chemistry.chemical_compound, Triterpene, Drug Discovery, Botany, Carbohydrate Conformation, Oleanolic acid, Triterpenoid saponin, Pharmacology, chemistry.chemical_classification, biology, Organic Chemistry, Glycoside, General Medicine, Saponins, biology.organism_classification, Triterpenes, Terpenoid, Carbohydrate Sequence, Complementary and alternative medicine, chemistry, Molecular Medicine, Pulsatilla
Abstract

Two new triterpenoid saponins, named cernuaside C and D, have been isolated from Pulsatilla cernua (Thunb.) Bercht. et Opiz. The structures of the two new triterpenoid saponins were elucidated as 3-O-beta-D-xylopyranosyl(1 --2)-[alpha-L-rhamnopyranosyl(1 --3)]-alpha-L-arabinopyranosyl oleanolic acid 28-alpha-L-rhamnopyranosyl(1 --4)-beta-D-glucopyranosyl(1 --6)-beta-D-glucopyranoside. (1) and 3-O-alpha-L-arabinopyranosyl (1 --3)-alpha-L-rhamnopyranosyl(1 --2)-alpha-L-arabinopyranosyl oleanolic acid 28-O-beta-D-glucopyranoside (2) by 1D, 2D-NMR techniques, ESI-MS analysis as well as chemical methods.

Published
2007

3. A new triterpenoid saponin from Albizia julibrissin Durazz

Author

Dong-Ming Xu, Yu Li, Jian-Zhao Niu, Tun-Hai Xu, Shengxu Xie, Yun-Shan Si, Hong-Feng Zhao, Dong Han, Hai-Tao Li, and Ya-Juan Xu

Subjects
Albizia julibrissin, Stereochemistry, Saponin, Pharmaceutical Science, Albizzia, Pharmacognosy, Analytical Chemistry, Triterpene, Drug Discovery, Triterpenoid saponin, Pharmacology, chemistry.chemical_classification, biology, Molecular Structure, Plant Stems, Chemistry, Organic Chemistry, Glycoside, General Medicine, Saponins, biology.organism_classification, Terpenoid, Triterpenes, Complementary and alternative medicine, Aminosugar, Plant Bark, Molecular Medicine
Abstract

A new triterpenoid, saponin hehuanoside A, was isolated together with the known triterpenoid saponins 2, 3, and 4 from the stem bark of Albizia julibrissin. With the help of chemical and spectral analyzes (IR, MS, 1D-NMR, and 2D-NMR), the structure of the new triterpenoid saponin was elucidated as 21-O-[(6S)-2-trans-2,6-dimethyl-6-O-beta-d-quinovopyranosyl-2,7-octadienoyl]-3-O-beta-d-xylopyranosyl-(1 --2)-beta-d-fucopyranosyl-(1 --6)-beta-d-2-deoxy-2-acetamidoglucopyrasyl acacic acid 28-O-alpha-l-arabinofuranosyl-(1 --4)-[-beta-d-glucopyranosyl-(1 --3)]-alpha-l-rhamnopyranosyl-(1 --2)-beta-d-glucopyranosyl ester (1). Three known triterpenoid saponins 2-4 were identified on the basis of spectroscopic data.

Published
2008

4. A novel steroidal glycoside, ophiofurospiside A from Ophiopogon japonicus (Thunb.) Ker-Gawl

Author

Yu Li, Dong Han, Hong-Feng Zhao, Jian-Zhao Niu, Ya-Juan Xu, Tun-Hai Xu, Dong-Ming Xu, and Shengxu Xie

Subjects
Spectrometry, Mass, Electrospray Ionization, Magnetic Resonance Spectroscopy, Stereochemistry, Ophiopogon japonicus, Saponin, Pharmaceutical Science, Pharmacognosy, Analytical Chemistry, Drug Discovery, Trisaccharide, Glycosides, Pharmacology, chemistry.chemical_classification, Traditional medicine, biology, Liliaceae, Ophiopogon, Organic Chemistry, Glycoside, General Medicine, Nuclear magnetic resonance spectroscopy, Saponins, biology.organism_classification, Complementary and alternative medicine, chemistry, Molecular Medicine, Steroids, Two-dimensional nuclear magnetic resonance spectroscopy, Drugs, Chinese Herbal
Abstract

A new furospirostanol saponin, ophiofurospiside A (1), was isolated together with the known steroidal glycosides 2, 3, and 4 from the tubers of Ophiopogon japonicus (Thunb.) Ker-Gawl. Using chemical and spectral analyses (IR, MS, 1D NMR, and 2D NMR), the structure of 1 was established as 26-O-beta-d-glucopyranosyl-(22S, 25R)-furospirost-5-ene-3beta, 17alpha, 26-triol-3-O-[alpha-l-rhamnopyranosyl-(1 --> 2)]-[beta-d-xylopyranosyl-(1 --> 4)]-glucopyranoside (1). Three known steroidal saponins 2-4 were identified on the basis of spectroscopic data.

Published
2008

5. Two new furostanol saponins from Tribulus terrestris L

Author

Tun-Hai Xu, Ya-Juan Xu, Sheng-Xiu Xie, Hong-Feng Zhao, Dong Han, Yu Li, Jian-zhao Niu, and Dong-Ming Xu

Subjects
Pharmacology, Spectrometry, Mass, Electrospray Ionization, Magnetic Resonance Spectroscopy, Molecular Structure, Organic Chemistry, Pharmaceutical Science, General Medicine, Saponins, Analytical Chemistry, Complementary and alternative medicine, Drug Discovery, Tribulus, Molecular Medicine, Drugs, Chinese Herbal
Abstract

Two new furostanol saponins, tribufurosides B (1) and C (2), were isolated from the fruits of Tribulus terrestris L. With the help of chemical and spectral analyses (IR, MS, 1D NMR and 2D NMR), the structures of two new furostanol saponins were established as 26-O-beta-d-glucopyranosyl-(25S)-5alpha-furost-20(22)-en-2alpha,3beta,26-triol-3-O-beta-d-galactopyranosyl(1 --2)-beta-d-glucopyranosyl(1 --2)-beta-d-galactopyranoside (1) and (25S)-5alpha-furost-20(22)-en-12-one-3beta, 26-diol-26-O-beta-d-glucopyranoside (2).

Published
2008

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