Two New Compounds from the Roots of and Their Molluscicidal Effects on

Two oleanane-type triterpenoid saponins named pedunsaponin D () and pedunsaponin E () were isolated from the roots of . The structures of the new compounds were elucidated based on chemical and physicochemical evidence as follows: pedunsaponin D, 3--β-glucopyranosyl-(1-3)-β-glucuronopyranosyl-3β,15α,23α-trihydroxy-11,13(18)-oleanadien-16-one (); pedunsaponin E, 3-O-β-glucopyranosyl-(1-2)-β-glucopy ranosyl(1-2)[β-glucopyranosyl(1-3)-β-glucuronopyranosyl]-3β-hydroxy-16-oxoolean-12-en-30-oic acid (). The two compounds showed moderate molluscicidal activity.[Formula: see text].