A new triterpenoid saponin, together with five known saponins, were isolated from the nonpolar
n-hexane fraction of the leaves of
Aralia elata. The structure of the new saponin, durupcoside C, was elucidated as hederagenin 3-
O-β-
D-glucopyranosyl(1→3)-β-
D-glucopyranosyl(1→3)-α-
L-arabinopyranoside on the basis of spectroscopic analysis. The known saponins were characterized as 3-
O-α-
L-rhamnopyranosyl(1→2)-α-
L-arabinopyranosyl hederagenin 28-
O-β-
D-xylopyranosyl(1→6)-β-
D-glucopyranosyl ester, hederagenin 3-
O-β-
D-glucopyranosyl(1→3)-α-
L-rhamnopyranosyl(1→2)-α-
L-arabinopyranoside, oleanolic acid 3-
O-β-
D-glucopyranosyl(1→3)-α-
L-rhamnopyranosyl(1→2)-α-
L-arabinopyranoside, hederagenin 3-
O-α-
L-rhamnopyranosyl(1→2)-α-
L-arabinopyranoside (α-hederin), and hederagenin 3-
O-β-
D-glucopyranosyl(1→3)-α-
L-arabinopyranoside (collinsonidin). In addition, two known lipids, Arisaema glyceride 3 and ceramide mixtures were also isolated and characterized. Collinsonidin and two known lipids were isolated for the first time from this plant.
抄録全体を表示