Bioactive Saponins and Glycosides.XXV.1)Acylated Oleanane-Type Triterpene Saponins from the Seeds of Tea Plant(Camellia sinensis)

摘要

Seven new acylated oleanane-type triterpene oligoglycosides,theasaponins A4(1),A5(2),C(3)E(4)E(5),G1(6),and H,(7),were isolated from the seeds of Japanese tea plant(Camellia sinensis).The structures of 1-7 were elucidated on the basis of chemical and physicochemical evidence.