Chemical constituents of Dalbergia odorifera

Fourteen compounds were isolated from Dalbergia odoriferae and purified by repeated column chromatography on silica and sephadex LH-20 gel and structurally identified by spectral analysis. These compounds were identified as 4,9-dimethoxy-3-hydroxypterocarpan(1),medicarpin(2),2',4',5-trihydroxy-7-methoxyisoflavone(3),2',3',7-trihydroxy-4'-methoxyisoflavan(4), formononetin(5),3,8-dihydroxy-9-methoxypterocarpan(6),koparin(7),3-hydroxy-9-methoxypterocarp-6a-ene(8),2'-hydroxyformononetin(9),stevenin(10),2',7-dihydroxy-4',5'-dimethoxyisoflavone(11),lyoniresinol(12),2,4-dihydroxy-5-methoxy-benzophenone(13) and neokhriol A(14). Compounds 1,3,4,6,8,12 and 14 were isolated from this plant for the first time. Antibacterial activity assay showed that compound 4 had inhibitory effect on Ralstonia solanacearum.