Three new flavonoid glycosides-soyaflavonosides A (1), B (2), and C (3)-together with 23 known ones were obtained from the 70% EtOH extract of Flos Sophorae (Sophora japonica, Leguminosae). Their structures were elucidated by chemical and spectroscopic methods. Among the known isolates, 14, 18, 20,
Fruits of Sophora japonica L. (Leguminosae) exhibited an inhibitory effect in the IL-5 bioassay of mIL-5-dependent Y16 proliferation. The isoflavonoids of sophoricoside, genistein, orobol, and genistin were isolated as the IL-5 inhibitors from fresh fruits of the plant by activity-guided