Phenolic Compounds from the Fruits of Ziziphus jujuba Mill

摘要

A new phenolic compound [2-hydroxy-1-(3'-hydroxy,4'-methoxy)-pentane-1,4-dione] (1), together with five known compounds (2-4) i.e., 4-hydroxy-3-methoxy-phenyl-1-0-(6'-0-galloyl)-P-D-glucopyranoside (2), batatasin(III) (3), D-glucopyranoside (4). glucopyranosylcaffeic acid (5) and vanillic acid (6) were isolated from the fruits of Ziziphus jujuba Mill. The structure of compound 1 was elucidated on the basis of extensive NMR and MS means. The antioxidant activity of (1) was evaluated and it showed antioxidant activity with an IC_(50) value of 2.92 μg/mL.