Four New Triterpenoid Saponins from the Leaves of Panax japonicus Grown in Southern Miyazaki Prefecture (4)

抄録

Four new dammarane-type triterpenoid saponins such as chikusetsusaponin LM₃ (1), chikusetsusaponin LM₄ (2), chikusetsusaponin LM₅ (3), chikusetsusaponin LM₆ (4), and twenty known triterpenoid saponins such as ginsenoside Rb₃ (5), ginsenoside Rc (6), ginsenoside Rd (7), ginsenoside Re (8), ginsenoside Rg₁ (9), ginsenoside F₃ (10), ginsenoside F₅ (11), ginsenoside F₆ (12), chikusetsusaponin IVa (13), chikusetsusaponin V (14), chikusetsusaponin L₅ (15), chikusetsusaponin L_9a (16), chikusetsusaponin L_9bc (17), chikusetsusaponin L₁₀ (18), chikusetsusaponin FK₂ (19), chikusetsusaponin FK₆ (20), chikusetsusaponin FK₇ (21), chikusetsusaponin FT₁ (22), chikusetsusaponin LM₁ (23), and chikusetsusaponin LM₂ (24), were isolated from the leaves of Panax japonicus C. A. MEYER collected in Miyazaki prefecture, Japan. The structures of new chikusetsusaponins were elucidated on the basis of spectral and physicochemical evidences.