Saponins Composition of Rhizomes, Taproots, and Lateral Roots of Satsuma-ninjin (Panax japonicus)

A new dammarane-type triterpenoid saponin, chikusetsusaponin VII (1), and nineteen known triterpenoid saponins, ginsenoside Rb-1 (2), ginsenoside Rb-3 (3), ginsenoside Re (4), ginsenoside Rd (5), ginsenoside Re (6), ginsenoside Rg(1) (7), ginsenoside Rg(2) (8), ginsenoside Rh-1 (9), notoginsenoside R1 (10), notoginsenoside R2 (11), notoginsenoside Fe (12), chikusetsusaponin IVa (13), chikusetsusaponin IV (14), chikusetsusaponin V (15), chikusetsusaponin VI (16), chikusetsusaponin FK6 (17), gypenoside XVII (18), 28-desglucosylchikusetsusaponin IV (19), and zingibroside R1 (20), were isolated from rhizomes, taproots, and lateral roots of Panax japonicus C. A. MEYER, so-called Satsuma-ninjin, grown in southern Miyazaki Prefecture, Japan. The structure of new chikusetsusaponin VII was elucidated on the basis of spectral and physicochemical evidence. Although the chemical composition of the rhizome was found to be similar to that of the Chikusetsuninjin, the saponin composition of lateral root of Satsuma-ninjin was found to be close to that of lateral root of P. ginseng. The total yield of oleanolic acid saponins of the taproot was less than that of rhizome, but the total yield of dammarane-type saponins of the taproot was found to be similar to that of rhizome.