A New Flavonoid from Camellia sinensis Fermented Tea

Area of Science:

• Phytochemistry
• Natural Products Chemistry

Background:

• Camellia sinensis L. (Pu-erh tea) is a fermented tea known for its unique bioactive compounds.
• Flavonoids are a diverse group of polyphenols with potential health benefits.

Purpose of the Study:

• To isolate and characterize a new flavonoid from fermented Pu-erh tea.
• To elucidate the chemical structure of the novel compound.

Main Methods:

• Isolation of the compound from fermented Camellia sinensis L. (Pu-erh tea).
• Elucidation of the chemical structure using spectroscopic data analysis (e.g., NMR, MS).

Main Results:

• A new flavonoid, quercetin 3-0-α-L-rhamnopyranosyl-(l-6)-(2-E-p-coumaroyl)-D-D-glucopyranoside-4'-O-α-L-rhamnopyranoside, was successfully isolated.
• The detailed chemical structure of this novel compound was determined.

Conclusions:

• The study reports the discovery of a previously unknown flavonoid from Pu-erh tea.
• Spectroscopic analysis confirmed the complex structure of the isolated quercetin derivative.