From the wood benzene and chloroform extracts of Swartzia brachyrachis Harms var.brachyrachis were isolated, by chromatografph methods, an undocumented isoflavone (7,4'-dihydroxy-5,3',5'—trimethoxy-6-methylisoflavone) named brachyrachisine and a glucoside (3-O-β-D-glucopyranosylsitosterol). The structures were elucidated by spectroscopic analysis.
Swartzia; 3-O-β-D-glucopyranosylsitosterol; brachyrachisine; 7,4'-dihydroxy-5,3',5'-trimethoxy-6-methylisoflavone