Studies on flavonoid glycosides with antiviral effect from Yinqiaosan on influenza virus

Object To study the chemical constituents with the antiviral effect from Yinqiaosan on influenza virus Methods Isolation of the constituents by different kinds of column chromatography and elucidation of their structures on the basis of chemical and spectral methods Results Four flavonoid glycosides were isolated and elucidated as 2′ O D apiofuranosyl (1→2) β D glucopyranosyl] isoliquiritigenin, 4′ isoliquiritigenin, 4′ O D apiofuranosyl (1→2) β D glucopyranosyl] isoliquiritigenin, 4 isoliquiritigenin, 4 O D apiofuranosyl (1→2) β D glucopyranosyl] isoliquiritigenin and 4′ isoliquiritigenin and 4′ O D apiofuranosyl (1→2) β D glucopyranosyl] liquiritigenin, respectively liquiritigenin, respectively Conclusion 2′ O D apiofuranosyl (1→2) β D glucopyranosyl] isoliquiritigenin is a new naturally compound isoliquiritigenin is a new naturally compound