A new Antioxidative Resveratrol Trimer from the Roots and Stems of Vitis quinquangularis

Xiaokai Wu , Jinrong Zhang, Binbin Gu , Shan He and Jiayin Zhang

School of Marine Sciences, Ningbo University, Ningbo , Zhejiang 315211, P. R. China

Management Bureau of Zhejiang Jiulongshan National Nature Reserve, Suichang, Zhejiang 323312 , P. R. China

Abstract: Phytochemical investigation of Vitis quinquangularis has led to the isolation of a new resveratrol trimer, quinquangularol (1), along with three known stilbenoids 2–4. The structure and relative configuration of 1 were established on the basis of spectroscopic evidence, especially HMBC and NOESY experiments. It showed potent antioxidant activity against DPPH (1,1-diphenyl-2-picrylhydrazyl) radical.

Keywords: Vitis quinquangularis ; resveratrol oligomer; quinquangularol; Vitaceae; antioxidant; DPPH. © 2015 ACG Publications. All rights reserved.