A rare prenylated isoflavone-quinone from the roots of .

In order to make more rational use of , a systematic separation from the roots of was performed in the current study. The investigation of chemical constituents resulted in the isolation of a rare prenylated isoflavone-quinone, fleminquinone A (), together with four known analogues (). Their structures were established by extensive physical and spectroscopic data analysis. Anti-inflammatory activities of the isolated compounds were evaluated in lipopolysaccharide induced mouse mononuclear macrophage leukemia cells RAW 264.7 model. Compound exhibited significant inhibitory effects on LPS-induced NO production and COX-2. Compound also significantly affected the levels of inflammatory cytokines.