文献类型：期刊文献

英文题名：A Steroidal Saponin from the Seeds of Allium tuberosum

作者：Hu, Guohua[1];Lu, Yanhua[1];Yu, Wenjian[2];Ding, Qingbao[1];Yang, Qin[2];Zhou, Jiachun[1];Ma, Zhengzhi[2]

机构：[1]E China Univ Sci & Technol, Sch Biotechnol, Dept Food Sci & Engn, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[2]Shanghai Normal Univ, Inst Food Addit & Ingredients, Shanghai 200234, Peoples R China

年份：2014

卷号：49

期号：6

起止页码：1082

外文期刊名：CHEMISTRY OF NATURAL COMPOUNDS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000330713200020)】；

基金：The work are supported by National Natural Science Foundation of China (31171747), the Fundamental Research Funds for the Central Universities and the National Special Fund for State Key Laboratory of Bioreactor Engineering, Grant No. 2060204. The authors are grateful for the assistance of Wang Xi, Center of Analysis & Research, East China University of Science and Technology, Shanghai, China, and Yu Yinghao, Center of Analysis & Research, Shanghai Normal University, Shanghai, P. R. China.

语种：英文

外文关键词：Allium tuberosum; Liliaceae; steroid saponins; tuberosides

摘要：In order to investigate its bioactive compounds, we studied the chemical constituents of the seeds of Allium tuberosum systematically. Our detailed investigation of its seeds has led to the discovery of a new saponin. The new steroidal saponin, named tuberoside B, was isolated from the seeds of Allium tuberosum Rottl. ex Spreng. On the basis of acid hydrolysis, comprehensive spectroscopic analyses and comparison with spectral data of the new compound, its structure was established as (24S,25S)-5 beta-spirostan-2 alpha,3 beta,5,24-tetraol 3-O-alpha-L-rhamnopyranoyl-(1 -> aEuro parts per thousand 2)-O-[alpha-L-rhamnopyranosyl-(1 -> aEuro parts per thousand 4)]-beta-D-glucopyranoside. The new compound was identified by direct comparison with authentic samples (co-TLC, IR, MS, NMR) and with reported spectral and physical data. This paper deals with the isolation and structural elucidation of the new saponin.