[Chemical constitutes of flavones from Pu-erh tea].
The chemical constituents in the Pu-erh tea were isolated by various column chromatographic methods, and their structures were identified by spectral data and physic-chemical analysis. As a result, eleven flavonoids were isolated and identified as kaempferol (1), quercetin (2), kaempferol-3-O-beta-D-glucopyranoside (3), kaempferol-3-O-beta-D-rutinoside (4), apigenin-6-C-alpha-L-arabinopyranosyl-8-C-beta-D-glucopyranoside (5), vitexin-4"-O-beta-D-glucopyranoside (6), kaempferol-3-O-[alpha-L-rhamnopyranosyl-(1--> 3)-alpha-L-rhamnopyranosyl-(1-->6)-beta-D-glucopyranoside] (7), quercetin3-O-beta-D-glucopyranoside (8), rutin (9), quercetin-3-0-alpha-L-rhamnopyranoside (10), and myricetin-3-0-beta-D-glucopyranoside (11). Compounds 5-7, 10 and 11 were isolated from Pu-erh tea for the first time.
State Key Laboratory of Natural and Biomimetic Drugs, Peking University School of Pharmaceutical Sciences, Beijng 100191, China. zhli2091@sina.com
Liang
L
Zhang
Peng-Fei
PF
Tu
D028241:Camellia sinensis / Q000737:chemistry*; D047309:Flavones / Q000737:chemistry*; D013058:Mass Spectrometry; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry*; D013662:Tea / Q000737:chemistry
D047309:Flavones; D010936:Plant Extracts; D013662:Tea