RESUMO
Objective To investigate the chemical constituents of Baoyuan Decoction.Methods Many chromatographic techniques and spectral analysis means were employed for isolation and identification of the constituents.Results Fifteen flavonoids were isolated from Baoyuan Decoction and their structures were identified as licuraside(1),formononetin-7-O-?-D-glucoside(2),formononetin(3),isomucronulatol(4),davidigenin(5),2',4'-dimethoxy-3'-hydroxyisoflavan-6-O-?-D-glucoside(6),(6aR,11aR)9,10-dimethoxypterocarpan-3-O-?-D-glucoside(7),calycosin(8),liquiritigenin(9),5-dehydroxykaempferol(10),liquiritin(11),isoliquiritin(12),isoliquiritigenin(13),7,3'-dihydroxy-5'-methoxyisoflavone(14),and odoriflavene(15).Conclusion All fifteen compounds are isolated from Baoyuan Decoction for the first time.