New Triterpenoid Saponins from Fruits Specimens of Panax japonicus Collected in Kumamoto and Miyazaki Prefectures (1)

Seven new dammarane-type triterpenoid saponins, chikusetsusaponin FK1 (1), chikusetsusaponin FK2 (2), chikusetsusaponin FK3 (3), chikusetsusaponin FK4 (4), chikusetsusaponin FK5 (5), chikusetsusaponin FK6 (6), and chikusetsusaponin FK7 (7), and eleven known triterpenoid saponins, ginsenoside Rb-3 (9), ginsenoside Re (10), chikusetsusaponin VI (11), ginsenoside Re (12), ginsenoside Rg(1) (13), pseudo-ginsenoside RS1 (14), notoginsenoside R1 (15), chikusetsusaponin L-5 (17), chikusetsusaponin L-10 (18), chikusetsusaponin IVa (19), and chikusetsusaponin V (20), were isolated from the fruits of Panax japonicus C. A. MEYER, collected in Kumamoto prefecture, Japan, and two new dammarane-type triterpenoid saponin, chikusetsusaponin FK5 (5) and chikusetsusaponin FM1 (8), and five known triterpenoid saponins, ginsenoside Rb-3 (9), ginsenoside Rc (10), ginsenoside Re (12), ginsenoside Rg(1) (13), and floralquinquenoside E (16), were isolated from the fruits of P. japonicus C. A. MEYER, collected in Miyazaki prefecture, Japan. The structures of new chikusetsusaponins were elucidated on the basis of chemical and physicochemical evidences.