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BioMed Research International
Volume 2013 (2013), Article ID 816145, 7 pages
http://dx.doi.org/10.1155/2013/816145
Research Article

Three New Steroidal Glycosides from the Roots of Cynanchum stauntonii

State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China

Received 19 July 2012; Accepted 17 September 2012

Academic Editor: Fátima Regina Mena Barreto Silva

Copyright © 2013 Jin-Qian Yu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Three new steroidal glycosides, named as stauntosides L, M, and N (1–3), along with one known steroidal glycoside, anhydrohirundigenin monothevetoside (4), were isolated from the 95% ethanol extract of the roots of Cynanchum stauntonii. The structures of these new compounds were elucidated on the basis of extensive spectroscopic analyses, mainly 1D and 2D NMR, HRESI-MS, and chemical methods.