狠狠综合久久久久综合网,亚州少妇无套内射激情视频,成年免费A级毛片免费看丶,欧美熟妇色ⅩXXX欧美妇

德思特生物專注于中藥(植物藥)物質(zhì)基礎(chǔ)研究以及天然化合物、中藥化學(xué)對(duì)照品實(shí)物生產(chǎn)供應(yīng)


天然藥物活性單體及中藥對(duì)照品專業(yè)生產(chǎn)供應(yīng)商


聯(lián)系方式

028-85003950

聯(lián)系方式

服務(wù)熱線:

028-8500-3950

公司傳真:028-85589956
公司郵箱:sales@tcmlmt.com
公司網(wǎng)址:usemark.cn
公司地址:四川省成都市溫江區(qū)海科路西段128號(hào)5棟


發(fā)表文獻(xiàn)展示

當(dāng)前位置:首頁關(guān)于德思特 > 發(fā)表文獻(xiàn)展示 >

Simultaneous Preparation of Abundant Flavonol Triglycosides from Tea Leaves

時(shí)間:2020-12-01   瀏覽次數(shù):  分享到:

Simultaneous Preparation of Abundant Flavonol Triglycosides from Tea Leaves

by   1,  1,  1,  2,  1,  1,* and  1,*
 
 
Academic Editor: Yukio Yoneda
Molecules 202025(21), 5140; https://doi.org/10.3390/molecules25215140
 Published: 4 November 2020
(This article belongs to the Special Issue Molecular Pharmacology of Green Tea)

 
Flavonol glycosides are important components of tea leaves, contributing to the bioactivities as well as bitterness and astringency of tea. However, the standards of many flavonol triglycosides are still not available, which restricts both sensory and bioactivity studies on flavonol glycosides. In the present study, we established a simultaneous preparation method of seven flavonol triglycoside individuals from tea leaves, which consisted of two steps: polyamide column enrichment and preparative HPLC isolation. The structures of seven flavonol triglycoside isolates were identified by mass and UV absorption spectra, four of which were further characterized by nuclear magnetic resonance spectra, namely, quercetin-3-O-glucosyl-rhamnosyl-glucoside, quercetin-3-O-rhamnosyl-rhamnosyl-glucoside, kaempferol-3-O-glucosyl-rhamnosyl-glucoside and kaempferol-O-rhamnosyl-rhamnosyl-glucoside. The purities of all isolated flavonol triglycosides were above 95% based on HPLC, and the production yield of total flavonol glycosides from dry tea was 0.487%. Our study provides a preparation method of flavonol triglycosides from tea leaves, with relatively low cost of time and solvent but high production yield. 

 Myricetin-3-O-glucoside (≥99%, M-glu), quercetin-3-O-glucoside (≥99%, Q-glu),
kaempferol-3-O-glucoside (≥98%, K-glu) were purchased from Chengdu DeSiTe Biological Technology
Co., Ltd. (Chengdu, China). H

熱門新聞

Afrormosine CAS:550-79-8 中藥對(duì)照品標(biāo)準(zhǔn)品

產(chǎn)品編碼:DA0040產(chǎn)品名稱:Afrormosine英文名:AfrormosineCAS登錄...

查看更多

德思特
版權(quán)所有:成都德思特生物技術(shù)有限公司 Copyright © 2016   蜀ICP備16023840號(hào)-2
公司地址:四川省成都市溫江區(qū)??坡肺鞫?28號(hào)5棟
公司電話:028-85003950

掃一掃關(guān)注德思特
   掃碼關(guān)注公眾號(hào)
衢州市| 河津市| 芦溪县| 济阳县| 祁东县| 九江县| 合阳县| 保康县| 吐鲁番市| 太仆寺旗| 武陟县| 兴宁市| 犍为县| 高碑店市|