Ultrasound-assisted extraction of bound phenolic compounds from the residue of Apocynum venetum tea and their antioxidant activities

作     者：Shengwei Sun Yiwen Zhao Luyao Wang Yuzhi Tan Yaning Shi Rita-Cindy Aye-Ayire Sedjoah Yuting Shao Longxiang Li Mengxi Wang Jiashuai Wan Xia Fan Rong Guo Zhihong Xin 

作者机构：Key Laboratory of Food Processing and Quality ControlCollege of Food Science and TechnologyNanjing Agricultural UniversityNanjing210095China 

出 版 物：《Food Bioscience》 (食品生物科学（英文）)

年 卷 期：2022年第47卷第3期

页      面：502-511页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：Ministry of Agriculture of the People's Republic of China, MOA, (GJFP201701505, GJFP20191101) Ministry of Agriculture of the People's Republic of China, MOA Priority Academic Program Development of Jiangsu Higher Education Institutions, PAPD Jiangsu Provincial Key Research and Development Program, (BE2017374-2) Jiangsu Provincial Key Research and Development Program 

主　　题：Apocynum venetum.L tea residue Ultrasound-assisted extraction Bound phenolic compounds Structural characterization Antioxidant activity 

摘      要：Bound phenolic compounds from the residue of Apocynum venetum(***)tea were released by alkaline digestion with sonication,followed by extraction using ethyl acetate(EtOAc).The fragment ions of compounds in free and bound forms were identified by liquid chromatography electrospray ionization tandem mass spectrometry(LC-ESI-MS/MS)in both positive and negative *** investigation of chemical constituents in the EtOAc extract led to the isolation of eleven individual compounds,and their chemical structures were identified as(−)-epicatechin(1),(−)-loliolide(2),(−)-syringaresinol-4-O-β-D-glucopyranoside(3),alloside of benzyl alcohol(4),3-[(6-O-hexopyranosylhexopyranosyl)oxy]-2-(palmitoyloxy)propyl(9Z,12Z,15Z)-9,12,15-octadecatrienoate(5),apocynoside I(6),quercetin-3-O-β-D-glucopyranoside(7),kaempferol-3-O-β-D-glucopyranoside(8),[1-acetyloxy-3-[3,4,5-trihydroxy-6-[[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]oxan-2-yl]oxypropan-2-yl]hexadecanoate(9),1-stearoyl-2-palmitoyl-sn-glycerol(10),and 3-hexene-l-O-β-D-glucoside(11)using a series of spectroscopic *** 2–5 and 9–11 were isolated for the first time from ***,while antioxidant experiments showed that compounds 1,7,and 8 displayed strong DPPH and ABTS+radical scavenging *** study represents the first investigation of bound phenolic compounds with potential health benefits in the residue of *** tea.