A saponin with diverse biological activities; inhibits the proliferation of, and induces apoptosis in, HeLa cells from 100-400 mg/L; inhibits viral replication in cells infected with HSV-1, HCMV, or influenza virus (IC50s = 54, 104, and 88 µM, respectively); prevents the development of acute liver failure in a mouse model of LPS/D-galactosamine-induced acute liver injury at 5 mg/kg