A Further Investigation on the Chemical Constituents from the Leaves of Panax notoginseng

Sixteen compounds were isolated from the ethanol extract of the leaves of Panax notoginseng.They were identified as ginsenoside Rh_2(1),F_2(4),Rg_3(5),Rg_1(7),Rd(8),Re(11),Rb_3(13),Rb_1(14),Rc(15);gypenoside XIII(2),IX(9),XVII(10);notoginsenoside R_1(12),Fa(16);liquiritigenin(3) and liquiritin apioside(6),respectively.It is noticed that compounds 1,2,3 and 6 are isolated from P.notoginsen for the first time,and compounds 1～8 and 10～12 are isolated from the leaves of this plant for the first time. It is also confirmed that the leaves of notoginseng mainly contain protopanaxdiol saponins along with protopanaxtriol saponins and flavonoids of small quantity.