Two new steroidal glycosides from the root of Cynanchum auriculatum

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-cymar...

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Bibliographic Details
Published in:Chinese chemical letters 2011, Vol.22 (1), p.77-80
Main Authors: Teng, Hong Li, Lu, Yu, Li, Jun, Yang, Guang Zhong, Mei, Zhi Nan
Format: Article
Language:English
Subjects:
Cyanoauriculosides A and B
Cynanchum auriculatum
Steroidal glycoside
化合物
吡喃葡萄糖
白首乌
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Summary: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.
ISSN:1001-8417
1878-5964
DOI:10.1016/j.cclet.2010.09.009