[Studies on chemical constituents from twigs of Morus atropurpurea].

ABSTRACT

OBJECTIVE: To study the chemical constituents of the twigs of Morus atropurpurea. METHOD: The compounds of the EtOAc fraction were isolated and purified by column chromatography on silica gel, polyamide, Sephadex LH -20, and their structures were elucidated on the basis of spectroscopic evidence (MS, NMR). RESULT: Eleven compounds were identified as mulberrin (1), cyclomulberrin (2), morusin (3), cyclomorusin (4), 2', 4',4, 2"-tetrahydroxy-3'-{3"-methylbut-3"-enyl-}-chalcone (5), mulberrofran G (6), scopoletin (7), moruchalcone A (8), kaempferol (9), ursolic acid (10), beta-daucosterol (11). CONCLUSION: Except compounds 9 and 11, all the other compounds were obtained from M. atropurpurea for the first time.