Abstract Phytochemical studies on several parts of Dalbergia tonkinensis Prain led to the isolation and determination of one alkaloid 1 , thirty flavonoids and flavonoid glycosides 2-31 , one sesquiterpene 32 and one phenol 33 . The chemical structures of the isolated constituents were determined by analysis of their NMR data and comparison to those of reference compounds. Among the isolated compounds, 3-(1 H -indol-3-yl)-2-methoxypropanamide ( 1 ) is a new compound in literature and it is the only indole derivative isolated from the genus Dalbergia . In addition, new compound 1 and buteaspermanol ( 14 ) demonstrate the close relationship among the species of the subfamily Faboideae. Carboxyethylflavanones 18-21 and neroplomacrol ( 32 ) could be seen as biochemical markers for the family Fabaceae, whereas naringin ( 17 ) and 4-formyl phenol ( 33 ) are considerably regarded as chemotaxonomic indicators for the genus Dalbergia . The chemotaxonomic aspects of these metabolites are discussed in detail.