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Two New Kaempferol Glycosides from Androsace umbellata

✍ Scribed by Jun Lei; Yun-Chuan Xiao; Jing Huang; Min Tang; Peng-Chi Deng

Book ID
102257718
Publisher
John Wiley and Sons
Year
2009
Tongue
German
Weight
157 KB
Volume
92
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Two new kaempferol glycosides, 5‐hydroxy‐2‐(4‐hydroxyphenyl)‐4‐oxo‐7‐(α‐L‐rhamnopyranosyloxy)‐4__H__‐chromen‐3‐yl 2‐O‐acetyl‐3‐O‐β‐D‐glucopyranosyl‐α‐L‐rhamnopyranoside (1) and 5‐hydroxy‐2‐(4‐hydroxyphenyl)‐4‐oxo‐7‐(α‐L‐rhamnopyranosyloxy)‐4__H__‐chromen‐3‐yl β‐D‐glucopyranosyl‐(1→2)‐6‐O‐[(2__E__)‐3‐(4‐hydroxyphenyl)prop‐2‐enoyl]‐β‐D‐glucopyranosyl‐(1→2)‐β‐D‐glucopyranoside (2), along with ten known compounds, were isolated from the 95% EtOH extract of the whole plant of Androsace umbellata. The structures of the new glycosides were determined on the basis of detailed spectroscopic analyses, including 1D‐ and 2D‐NMR, MS, and chemical methods.

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