Extraction and Structural Characterization of Flavonoids from Twigs of Sophora japonica
Chuan-Ling Si,
Xiao-Feng Huang,
Liang-Liang An,
Su Fan,
Cui-Yun Liu,
Dan-Ni Xie,
Yi-Mei Hong,
Jianjun Chen
Affiliations
Chuan-Ling Si
Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China; State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China; China
Xiao-Feng Huang
Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China; China
Liang-Liang An
Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China; China
Su Fan
Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China; China
Cui-Yun Liu
Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China; China
Dan-Ni Xie
Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China; China
Yi-Mei Hong
Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China; China
Jianjun Chen
Department of Pharmaceutical Sciences, College of Pharmacy, Chicago State University, Chicago, IL, 60628, USA; United States
Flavonoids represent a large group of polyphenols that have been recognized to exert a wide range of biological effects, such as anticancer, inflammation inhibition, anti-aging, and neuroprotective activities. In the forest industry, tree twigs have been treated as residues; however, tree twigs could be a rich source of high-value added compounds, which have been relatively unexplored. In this study, an investigation into the chemical constituent of extractives from S. japonica twigs resulted in the isolation of a new (Z)-caffeoyl flavonol glycoside that was elucidated as myricetin 3-O-(4′′-(Z)-caffeoyl)-α-rhamnopyranoside (IV). The structure of the new compound was established mostly on the basis of extensive spectroscopic techniques and other physiochemical evidences. Among the three known flavonoids extracted in this work, including isoquercitrin (I), isorhamnetin 3′-O-β-D-glucopyranoside (II), and myricitrin (III), II and III have never been previously reported in the Sophora genus.
