Molecules 2011, 16(7), 5674-5681; doi:10.3390/molecules16075674
Article

Lianqiaoxinoside B, a Novel Caffeoyl Phenylethanoid Glycoside from Forsythia suspensa

Hai-Xue Kuang* email, Yong-Gang Xiaemail, Jun Liangemail, Bing-You Yangemail and Qiu-Hong Wangemail
Key Laboratory of Chinese Materia Medica (Heilongjiang University of Chinese Medicine), Ministry of Education, Harbin 150040, China
* Author to whom correspondence should be addressed.
Received: 25 May 2011; in revised form: 21 June 2011 / Accepted: 22 June 2011 / Published: 4 July 2011
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Abstract: Chemical investigation of the 70% ethanol extract of the unripe fruits of Forsythia suspensa resulted in the isolation of a novel caffeoyl phenylethanoid glycoside, lianqiaoxinoside B, together with the known compound forsythoside H. The new compound was elucidated to be 1'',2''-[β-(3,4,-dihydroxylphenyl)-α,β-dioxoethanol]-3''-O-caffeoyl-O-α-rhamnopyranosyl-(1→6)-O-β-glucopyranoside by extensive spectroscopic and chemical studies. Lianqiaoxinoside B and forsythoside H showed strong antioxidant and antimicrobial activities in vitro by the 2,2'-azinobis-3-ethylbenzothiazoline-6-sulphonate (ABTS) radical-scavenging assay and plate method. This study can be further extended to exploit for the possible application of caffeoyl phenylethanoid glycosides as the alternative antioxidants and antimicrobial agents of natural origin.
Keywords: Forsythia suspensa; caffeoyl phenylethanoid glycoside; antioxidant and antimicrobial activities

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MDPI and ACS Style

Kuang, H.-X.; Xia, Y.-G.; Liang, J.; Yang, B.-Y.; Wang, Q.-H. Lianqiaoxinoside B, a Novel Caffeoyl Phenylethanoid Glycoside from Forsythia suspensa. Molecules 2011, 16, 5674-5681.

AMA Style

Kuang H-X, Xia Y-G, Liang J, Yang B-Y, Wang Q-H. Lianqiaoxinoside B, a Novel Caffeoyl Phenylethanoid Glycoside from Forsythia suspensa. Molecules. 2011; 16(7):5674-5681.

Chicago/Turabian Style

Kuang, Hai-Xue; Xia, Yong-Gang; Liang, Jun; Yang, Bing-You; Wang, Qiu-Hong. 2011. "Lianqiaoxinoside B, a Novel Caffeoyl Phenylethanoid Glycoside from Forsythia suspensa." Molecules 16, no. 7: 5674-5681.

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