Two New Cardiac Glycosides from Streblus asper

Two undescribed cardiac glycosides, strasperoside K (1) and L (2), together with five known analogues (3-7), were isolated from Streblus asper Lour. Their structures were elucidated on the basis of spectroscopic analysis and chemical methods. The inhibitory activities of isolated compounds against porcine epidemic diarrhea virus (PEDV) and six strains of pathogenic bacteria were evaluated.