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Two new steroidal glycosides from the root of Cynanchum auriculatum

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Chinese Chemical Letters 2011年第1期22卷 77-80页

作者： Hong Li Teng Yu Lu Jun Li Guang Zhong Yang Zhi Nan Mei Guangxi Institute of Minority Medicine Nanning 530001 China College of Pharmacy South Central University for Nationalities Wuhan 430074 China

Two new steroidal glycosides named cyanoauriculoside A （1） and B （2）, have been isolated from the roots of Cynanchum auriculatum Royle ex Wight. The structure of cyanoauriculoside A （1） was determined to be 20-O-acetyl-penupogenin-3-O-β-D- glucopyranosyl-（ 1 →4）-β-D-glucopyranosyl-（ 1 →4）-α -L-cymaropyranosyl- （ 1 →4）-β-D-cymaropyranosyl- （ 1 →4）-α-L-diginopyranosyl-（1→4）-β-D-cymaropyranoside. Cyanoauriculoside B （2） was characterized as 20-O-acetylpenupogenin-3-O-β-D-gluco- pyranosyl-（ 1 →4）-α-L-cymaropyranosyl-（ 1 →4）-β-D-cymaropyranosyl-（ 1 →4）-α-L-diginopyranosyl-（ 1 →4）-β-D-cymaropyranoside. The structures of these compounds were elucidated based on the chemical and spectroscopic evidence.

关键词： Cynanchum auriculatum steroidal glycoside Cyanoauriculosides A and B

Two New steroidal glycosides from Liriope muscari

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Chinese Chemical Letters 2006年第1期17卷 31-34页

作者： Zhi Hong CHENG Tao WU Yin Long GUO Bo Yang YU Luo Shan XU School of Chinese Pharmacy China Pharmaceutical University Nanjing 210038 Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 Institute of Chinese Materia Mcdica Shanghai University of Traditional Chinese Medicine Shanghai 201203

Two new steroidal glycosides named Lm-4 （1） and Lm-5 （2） were isolated from the tubers of Liriope muscari. Their structures were elucidated by 1D and 2D NMR, ESI/MALDIMS techniques, and chemical methods.

关键词： Liriope muscari steroidal glycoside Lm-4 Lm-5.

A New Asterosaponin from the Starfish Culcita novaeguineae

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Chinese Chemical Letters 2005年第5期16卷 619-622页

作者： HaiFengTANG YangHuaYI LingLI PengSUN DaZhengZHOU BaoShuLIU ResearchCenterforMarineDrugs SchoolofPharmacySecondMilitaryMedicalUniversityShanghai200433

A new asterosaponin named novaeguinoside A, along with a known saponin, asteronyl pentaglycoside sulfate, was isolated from the starfish Culcita novaeguineae. The new compound was identified to be sodium 6α-O-{β-D-fucopyranosyl-(1→2)-β-D-fucopyranosyl-(1→4)-[β-D- quinovopyranosyl-(1→2)]-β-D-xylopyranosyl-(1→3)-β-D-quinovopyranosyl}-5α-pregn-9(11)-en- 20-one-3β-yl-sulfate by extensive spectral analysis and chemical evidence.

关键词： Starfish Culcita novaeguineae steroidal glycoside asterosaponin novaeguinoside A.

Two new 24-hydroxylated asterosaponins from Culcita novaeguineae

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Chinese Chemical Letters 2009年第10期20卷 1227-1230页

作者： Xiao Guang Ma Hai Feng Tang Chang Hai Zhao Ning Ma Min Na Yao Ai Dong Wen Department of Pharmacy Xijing Hospital Fourth Military Medical University Xi'an 710032 China Hospital of Xi'an University of Finance and Economics Xi'an 710061 China Department of Nutrition Xijing Hospital Fourth Military Medical University Xi'an 710032 China

Two new 24-hydroxylated asterosaponins, sodium （20R,24S）-6α-O-（4-O-sodiumsulfato-β-D-quinovopyranosyl）-5α-cholest- 9（11）-en-3β,24-diol 3-sulfate （1） and sodium （20R,24S）-6α-O-β-O-methyl-β-D-quinovopyranosyl-（1→2）-β-D-xylopyranosyl- （1 → 3）-[3-D-glucopyranosyl]-5α-cholest-9（11）-en-3β,24-diol 3-sulfate （2）, were isolated from the starfish Culcita novaeguineae. Their structures were elucidated by extensive spectral analysis and chemical evidences.

关键词： Starfish Culcita novaeguineae steroidal glycoside Asterosaponin

Enzymatic Degradation of Parvifloside

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Acta Botanica Sinica 2002年第10期44卷 1243-1249页

作者：金建明刘锡葵滕荣伟杨崇仁中国科学院昆明植物研究所植物化学与西部植物资源持续利用国家重点实验室昆明650204

Parvifloside (1), a new furostanol pentaglycoside, was isolated from the fresh rhizomes of Dioscorea parviflora C. T. Ting. On the basis of spectroscopic and chemical methods, its structure was elucidated as (25R)-26-O-β-glucopyranosyl-furost-5-en-3β,22ξ,26-triol 3-O-β-D-glucopyranosyl (1→3)-β-D-glucopyranosyl (1→4)-[α-L-rhamnopyranosyl (1→2)]-β-D-glucopyranoside. Six prosapogenins (2-7)were obtained from the enzymatic degradation of 1by cellulase, but only 3 and 4 were obtained by β-glucosidase. The structures of all compounds were determined by spectroscopic data. The activity of the isolated compounds on deformation of mycelia germinated from Pyricularia oaryzae P-2b conidia was evaluated.

关键词： Dioscorea parviflora parvifloside steroidal glycoside enzymatic degradation