Five new steroids, including the four new steroidal saponins ypsilandroside B (1), ypsilandroside A (2), isoypsilandroside A (4), and isoypsilandroside B (5), as well as the new steroidal sapogenin isoypsilandrogenin (3), were isolated from the whole plant of Ypsilandra thibetica Franch. Their
Ypsilandra thibetica belongs to the family Liliaceae. Its whole plant has the medicinal functions of heat-clearing and detoxifying, relieving congestion and other effects, and is used as the folk medicine to cure scrofula, dysuria embolism and other symptoms. Previous chemical studies revealed that