A biflavonoid with diverse biological activities inhibits the aggregation of AB40 in vitro (IC50 9.5 M) promotes pre-mRNA splicing of the genes encoding Mcl-1 and eIF4a and inhibits pre-mRNA splicing of the genes encoding Hsp40 and RIOK3 in NB4 cells at 10 UM increases protein SUMOylation in HEK293 cells at 10 UM reduces the cytopathic effect of the influenza A subtypes H1N1 and H1N3 influenza B parainfluenza type 3 and RSV (IC50s 1.4 1.3 1.2 1 and 2.5 Ug/ml respectively) inhibits the migration and invasion of and induces apoptosis in KYSE-150 cells from 10-40 UM reduces tumor volume in a KYSE-150 mouse xenograft model at 25 or 50 mg/kg