摘要

A new alkylene dihydrofuran glycoside (1) was isolated from the root bark of Morus alba L., along with moracin M-3'-O-beta-D-glucopyranoside (2), and moracin M-6, 3'-di-O-beta-D-glucopyranoside (3). Compound 1 was identified as 2-methylene-3-methoxy-2,5-dihydrofuran-4-O-beta-D-glucopyranosicle on the basis of chemical and spectroscopic data including 1D and 2D NMR spectral analysis. In addition, the antioxidant activity of 1 was evaluated using the 1,1-dipheny1-2-picrylhydrazyl (DPPH) and 2,2'-azinobis-3-ethylbenzothiazoline-6-sulphonic acid (ABTS) assay. The IC(50) values were 2.49 and 0.45 mg/mL, respectively.