pratensein/황기속

Four 3'-hydroxy-4'-methoxy-isoflavonoids: calycosin-7-O-beta-D-glucopyranoside (1), calycosin (2), pratensein-7-O-beta-D-glucopyranoside (3), and pratensein (4) were isolated from Astragalus membranaceus var. mongholicus, among which compound 4 was obtained from this plant for the first time. The

OBJECTIVE To study the isoflavonoid constituents of the roots of Astragalus membranaceus var. mongholicus. METHODS Such column chromatography methods as HPD-100 macroporous adsorption resin, silica gel, polyamide and Sephadex LH-20 gel were used for seperating and purifying isoflavonoids, and their

OBJECTIVE To study the chemical constituents and activity of total flavonoids contained in Yushen Tang,in order to lay a foundation for defining active consituents of the prescription and their mechanism. METHODS The activity of total flavonoids contained in Yushen Tang were evaluated by in vitro