Chemical Constituents of the Ficus elastica Leaves and Their Antioxidant Activities

摘要

Ficus elastica Roxb. Ex Hornem also known as rubber tree, is a tree species belonging to the Moraceae family. This plant grows profusely without any agronomic management and survives well under extreme environmental conditions such as high temperature and limited water supply. F. elastica possesses antimicrobial activity and the leaves extract is used for the treatment of skin infections and skin allergies, as well as a diuretic agent. In addition, several chemical constituents from F. elastica have been investigated. Previously, we reported the antioxidant activities of compounds from the leaves of F microcarpa and F. callosa. In our screening project for antioxidant activities from Ficus species, the leaves of F elastica was found to exhibit significant antioxidant activities. As part of our continuing research into the biological activities of F elastica leaves, we report herein the isolation, structural elucidation, and evaluation of antioxidant activities of extracts, as well as two new compounds, ficuselastic acid (2) and (l'S,6'R)-8-O-β-D-glucopyranosyl abscisate sodium (7), along with twelve known compounds from the leaves of F elastica.