一区二区三区精华液9色,国产A级毛片久久久精品毛片,99久久这里只有精品不卡,欧美禁片性船在线观看

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


天然藥物活性單體及中藥對照品專(zhuān)業(yè)生產(chǎn)供應商


聯(lián)系方式

028-85003950

聯(lián)系方式

服務(wù)熱線(xiàn):

028-8500-3950

公司傳真:028-85589956
公司郵箱:sales@tcmlmt.com
公司網(wǎng)址:m.quanxiaopang.com
公司地址:四川省成都市溫江區??坡肺鞫?28號5棟


發(fā)表文獻展示

當前位置:首頁(yè)關(guān)于德思特 > 發(fā)表文獻展示 >

Simultaneous Preparation of Abundant Flavonol Triglycosides from Tea Leaves

時(shí)間:2020-12-01   瀏覽次數:  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). 

熱門(mén)新聞

Afrormosine CAS:550-79-8 中藥對照品標準品

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

查看更多

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

掃一掃關(guān)注德思特
   掃碼關(guān)注公眾號
万州区| 筠连县| 精河县| 洛阳市| 黑山县| 白朗县| 普宁市| 襄垣县| 五指山市| 广灵县| 皮山县| 湖口县| 顺昌县| 大城县| 长阳| 霍州市| 桑日县| 卢龙县| 陵川县| 平果县| 鄂尔多斯市| 丹江口市| 罗平县| 翁牛特旗| 滦南县| 合阳县| 永修县| 老河口市| 康乐县| 双柏县| 岗巴县| 衢州市| 赣州市| 海宁市| 吴川市| 阜南县| 和顺县| 呼玛县| 汉源县| 博兴县| 井陉县|