نتایج جستجو برای: 5 caffeoyl quinic acid

تعداد نتایج: 1845563  

Journal: :Molecules 2015
Guillermo Schmeda-Hirschmann Cristina Quispe Benita González

The aerial parts of several Haplopappus species (Asteraceae), known under the common name "baylahuen", are used as herbal teas in Chile and Argentina. In Chile, "baylahuen" comprises H. multifolius, H. taeda, H. baylahuen and H. rigidus. Little is known about the chemical identity of the infusion constituents in spite of widespread consumption. The aim of the present work was the characterizati...

Journal: :Journal of agricultural and food chemistry 2012
Jian-Guo Xu Qing-Ping Hu Yu Liu

Chlorogenic acid is a well-known antioxidant and has more isomers according to the difference in binding location and number of caffeic on quinic acid. In this study, we investigated and compared the profiles of antioxidant and DNA-protective activities of chlorogenic acid isomers including three caffeoylquinic acid isomers (3-O-caffeoylquinic acid, 3-CQA; 4-O-caffeoylquinic acid, 4-CQA; and 5-...

2015
Yang Yu Zhibo Jiang Weixia Song Yongchun Yang Yuhuan Li Jiandong Jiang Jiangong Shi

Three new glucosylated caffeoylquinic acid isomers (1-3), along with six known compounds, have been isolated from an aqueous extract of the flower buds of Lonicera japonica. Structures of the new compounds were determined by spectroscopic and chemical methods as (-)-4-O-(4-O-β-d-glucopyranosylcaffeoyl)quinic acid (1), (-)-3-O-(4-O-β-d-glucopyranosylcaffeoyl)quinic acid (2), and (-)-5-O-(4-O-β-d...

Journal: :Molecules 2016
Jeong-Yong Cho Jin Young Kim Yu Geon Lee Hyoung Jae Lee Hyun Jeong Shim Ji Hye Lee Seon-Jae Kim Kyung-Sik Ham Jae-Hak Moon

Four new dicaffeoylquinic acid derivatives and two known 3-caffeoylquinic acid derivatives were isolated from methanol extracts using the aerial parts of Salicornia herbacea. The four new dicaffeoylquinic acid derivatives were established as 3-caffeoyl-5-dihydrocaffeoylquinic acid, 3-caffeoyl-5-dihydrocaffeoylquinic acid methyl ester, 3-caffeoyl-4-dihydrocaffeoylquinic acid methyl ester, and 3,...

Journal: :Biological & pharmaceutical bulletin 2010
Byung-Il Lee Agung Nugroho Moch Saiful Bachri Jongwon Choi Kang Ro Lee Jae Sue Choi Won-Bae Kim Kyung-Tae Lee Jong-Dai Lee Hee-Juhn Park

The leaves of three Ligularia species belonging to the family Compositae, Ligularia stenocephala, L. fischeri, and L. fischeri var. spiciformis, were qualitatively and quantitatively analyzed on the caffeoylquinic acids by HPLC and subjected to peroxynitrite-scavenging assay. The IC(50) of the MeOH extract of L. stenocephala was 1.62+/-0.03 mug/ml and the major caffeoylquinic acids of L. stenoc...

Journal: :European journal of pharmacology 2002
Tomas de Paulis Dennis E Schmidt Aleksandra K Bruchey Michael T Kirby Michael P McDonald Patricia Commers David M Lovinger Peter R Martin

Preliminary screening of a minor, non-xanthine constituent of roasted coffee, 3,4-diferuloyl-1,5-quinolactone (DIFEQ), showed inhibition of the adenosine transporter at low micromolar concentration. DIFEQ is a neutral derivative of the chlorogenic acids, i.e. isomeric mono- and di-substituted coumaroyl-, caffeoyl-, and feruloyl-esters of quinic acid, formed in the roasting process of coffee. Di...

Journal: :Biological & pharmaceutical bulletin 2001
J Y Hur Y Soh B H Kim K Suk N W Sohn H C Kim H C Kwon K R Lee S Y Kim

Aster scaber T. (Asteraceae) has been used to treat bruises, snakebite, headache, and dizziness in traditional Chinese medicine. In the present study, the neuroprotective effect of four quinic acid derivatives from A. scaber on amyloid Abeta-induced PC12 cell toxicity was investigated. When cells were treated with quinic acid derivatives prior to Abeta, cell toxicity was significantly diminishe...

Journal: :Biological & pharmaceutical bulletin 2009
Hiroshi Izuta Yukimi Narahara Masamitsu Shimazawa Satoshi Mishima Shin-ichi Kondo Hideaki Hara

The aim of this work was to investigate the antioxidant property of honeybee products and their constituents using an ESR method. Antioxidative activity was evaluated as the scavenging activity of 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical. The DPPH radical scavenging activities, in descending order, were: ethanol extract of Chinese red propolis>ethanol extract of Brazilian green propolis>wat...

2000
Armandodoriano Bianco Francesco Bonadies Cristiana Melchioni

3and 4-monoesterified protocatechuic acid methyl ester (5 and 7 respectively) have been synthesised from quinic acid by a high yields biomimetic rearrangement.

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