Chemical constituents from ethyl acetate extract of the leaves of Rourea harmandiana Pierre

Rourea harmandiana Pierre is a species which belongs to the family of Connaraceae. This plant is found abundantly in central of Vietnam (Thua Thien - Hue, Da Nang). Chemical study on the ethyl acetate extract of Rourea harmandiana leaves has led to the isolation of four compounds including vomifoliol (1), boscialin (2), abscisic acid (3) and p-coumaric acid (4). The structures of these compounds have been identified by NMR, MS spectroscopic data and comparison with the reported literature. These compounds were isolated from Rourea harmandiana species as well as from the genus Rourea for the first time.