Chemical constituents from twigs and leaves of Melodinus hemsleyanus

To study the chemical constituents in the twigs and leaves of Melodinus hemsleyanus. The chemical constituents were isolated by silica gel, ODS and Sephadex LH-20 column chromatographies. Their structures were determined by chemical and spectroscopic methods. Fourteen compounds were isolated from the 95% ethanol extract of the twigs and leaves of M. hemsleyanus. Their structures were identified as 11-hydroxytabersonine (1) , venalstonid (2), sandine (3), oleanolic acid (4), ursolic acid (5), betulin (6) , (+)-pinoresinol (7), (-)-syringaresinol (8), 8-hydroxypinoresinol (9), (-)-latifolin (10) , cirsilineol (11) , loganin (12) , dibutylterephthalate (13) , and beta-sitosterol(14). Compounds 4-14 were obtained from this plant for the first time.