期刊
FOOD CHEMISTRY
卷 170, 期 -, 页码 110-117出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2014.08.075
关键词
Fuzhuan brick tea (FBT); B-ring fission metabolites of catechins (BRFCs); Fuzhuanin C-F; Camellia sinensis; Eurotium spp.; Aspergillus spp.
资金
- Anhui Agricultural University Talents Foundation [YJ2011-06]
- Earmarked Fund for Modern Agro-industry Technology Research System in Tea Industry of Chinese Ministry of Agriculture [nycytx-26]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT1101]
HPLC analysis of samples from four major fermentation procedures of Jing-Wei Fu brick tea showed that the level of major tea catechins epigallocatechin gallate (EGCG) and epicatechin gallate (ECG) dropped increasingly to about 1/3 in the final product. Phytochemical study of the final product led to the discovery of four new B-ring fission metabolites of catechins (BRFCs) Fuzhuanin C-F (1-4) together with three known BRECs (5-7), six known catechins (8-13), five simple phenols (14-18), seven flavones and flavone glycosides (19-25), two alkaloids (26, 27), three triterpenoids (28-30) and one steroid (31). The structures were elucidated by spectroscopic methods including 1D and 2D NMR, LC-HR-ESI-MS, IR, and CD spectra. Five compounds (16-18,28, 29) were reported for the first time in tea. Possible pathways for the degradation of major tea catechins and the generation of BRFCs were also provided. (C) 2014 Elsevier Ltd. All rights reserved.
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