Studies on the Constituents of Panacis Japonici Rhizoma. V. The Structures of Chikusetsusaponin I, Ia, Ib, IVa and Glycoside P₁

Abstract

Chikusetsusaponin I, Ia, Ib, IVa, and glycoside P₁, the minor saponins and fattyacylglycoside of Panacis japonici rhizoma (rhizome of Panax japonicum C. A. MEYER) have been isolated. The structure of these saponins have been established as 1, 2, 3, 4, and 5, respectively. Chikusetsusaponin I is identical with ginsenoside-Rg₂, isolated from P. ginseng C. A. MEYER, while chikusetsusaponin IVa is identical with saponin C, isolated from P. pseudoginseng subsp. himalaicus var. angustifolius.