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Your search keyword '"Xie, Bai-Bo"' showing total 14 results
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14 results on '"Xie, Bai-Bo"'

3. New 23-Spirocholestane Derivatives from Ypsilandra thibetica

Author

Xie, Bai-Bo, additional, Chen, Chang-Xiang, additional, Guo, Yong-Hui, additional, Li, Yu-Ye, additional, Liu, Ya-Juan, additional, Ni, Wei, additional, Yang, Liu-Meng, additional, Gong, Ning-Bo, additional, Zheng, Yong-Tang, additional, Wang, Rui-Rui, additional, Lü, Yang, additional, and Liu, Hai-Yang, additional

Published
2013
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12. A new dinorclerone diterpenoid glycoside from Tinospora sinensis.

Author

Dong, Lang-Ping, Chen, Chang-Xiang, Ni, Wei, Xie, Bai-Bo, Li, Jun-Zhu, and Liu, Hai-Yang

Abstract

A new dinorclerone diterpenoid glycoside, named 1-deacetyltinosposide A (1), was isolated from the stem of Tinospora sinensis together with 10 known compounds. Their structures were elucidated on the basis of extensive spectroscopic techniques (MS, IR, 1D and 2D NMR experiments). [ABSTRACT FROM AUTHOR]

Published
2010
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14. [A new aristolochic acid derivative from Asarum himalaicum].

Author

Xie BB, Shang MY, Wang X, Cai SQ, and Lee KH

Subjects
Aristolochic Acids chemistry, Chromatography, High Pressure Liquid, Coumaric Acids chemistry, Coumaric Acids isolation & purification, Hydroxybenzoates chemistry, Hydroxybenzoates isolation & purification, Magnetic Resonance Spectroscopy, Molecular Structure, Parabens chemistry, Parabens isolation & purification, Propionates, Sitosterols chemistry, Sitosterols isolation & purification, Spectrometry, Mass, Electrospray Ionization, Aristolochic Acids isolation & purification, Asarum chemistry, Plants, Medicinal chemistry
Abstract

To study the chemical constituents of Asarum himalaicum, fifteen compounds were isolated from a 70% ethanol extract by using a combination of various chromatographic techniques including column chromatography over silica gel, Sephadex LH-20, and semi-preparative HPLC. By spectroscopic techniques including 1H NMR, 13C NMR, and HR-ESI-MS, these compounds were identified as 4-demethoxyaristolochic acid BII (1), aristolochic acid I (2), aristolochic acid Ia (3), 7-hydroxyaristolochic acid I (4), aristolochic acid IV (5), aristolic acid II (6), debilic acid (7), aristololactam I (8), 9-hydroxyaristololactam I (9), 7-methoxyaristololactam IV (10), (2S)-narigenin-5, 7-di-O-beta-D-pyranosylglucoside (11), 4-hydroxybenzoic acid (12), 3, 4-dihydroxybenzoic acid (13), 4-hydroxycinnamic acid (14), and beta-sitosterol (15). All of these compounds (1-15) were obtained from A. himalaicum for the first time. Among them, 1 was identified as a new compound, and compounds 3-6, 9, 12-14 were isolated from Asarum genus for the first time. Since the kidney toxicity of aristolochic acids and aristololactams has been reported, the result of this investigation suggests that it should be cautioned to use A. himalaicum as a medicine.

Published
2011

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