From the methanol extract of the bark of S. buxifolia Reiss (Rhamnaceae), a new cyclopeptidic alkaloid, together with the already known alkaloids scutianines-B-E, were isolated. On the basis of elemental analysis, mass spectroscopy (EI and FAB) and H-1 NMR spectroscopy, the molecular structure of scutianine-J has been elucidated.