Triterpenoid glycosides from Stauntonia chinensis
A new bidesmoside triterpenoid saponin, named stauntoside C1 (1), along with three known saponins (2–4) was isolated from Stauntonia chinensis DC. (Lardizabalaceae). Their structures were established by means of spectral and chemical methods as 3-O-β-d-xylopyranosyl-(1 → 2)-O-β-d-xylopyranosyl-(1 → 3)-O-α-l-rhamnopyranosyl-(1 → 2)-α-l-arabinopyranosyl oleanolic acid 28-O-α-l-rhamnopyranosyl-(1 → 4)-β-d-glucopyranosyl-(1 → 6)-β-d-glucopyranosyl ester (1), scabiosaponin E (2), sieboldianoside B (3), and kizutasaponin K12 (4).
Structures of two nortriterpenoid saponins from Stauntonia chinensis.
Two new nortriterpenoid saponins, designated yemuoside YM8 [1] and yemuoside YM9 [2], were isolated from Stauntonia chinensis. A new saponin 3 was obtained from the cleavage of the ester-glycoside linkage of 1 or 2. Structures were elucidated on the basis of chemical and physicochemical evidence.
Steroidal saponins from the rhizomes of Polygonatum orientale.
Abstract Two steroidal compounds were isolated from the fresh rhizomes of Polygonatum orientale and their structures elucidated as sceptrumgenin 3-O-β- d -lycotetraoside, akyrogenin 3-O-β- d -glucopyranosyl-(1→3)-[β- d -glucopyranosyl-(1→2)]-β- d -glucopyranosyl-(1→4)-β- d -galactopyranoside (spiroakyroside), on the basis of physical and chemical investigations.