Capspinosin, a New Flavonoid from Capparis spinosa

Capspinosin (1), a new highly oxygenated flavonoid has been isolated from the ethyl acetate soluble sub-fraction of Capparis spinosa along with 5-hydroxy-3',4',6,7,8pentamethoxyflavone (2), 7,8-dihydroxycoumarin (3), 7,5′-dimethoxy-3,5,2′-trihydroxyflavone (4), 5,6-dihydroxy-4,7-dimethoxy-2-methyl anthraquinone (5) and 3′,4′,5-trihydroxyflavone 7-O-β-Dglucopyranoside (6), reported for the first time from the genus Capparis. Their structures were assigned from the spectral data including 1D and 2D-NMR.