Aristolactams from the stem bark of Uvaria hamiltonii.

a voucher specimen has been maintained under the accession number DACB-27943. Although Uvaria hamiltonii growing in Bangladesh has not been studied before, two #avanones, an aurone, a chalcone and a tetrahydroxanthene have been reported from this plant (Huang et al., 1998). A total of "ve aristolactams have been isolated from the stem bark of U. hamiltonii. Four of these were isolated from the dichloromethane extract, while the "fth alkaloid