抄録
The more polar four triterpenoid saponins, D-G, of the seven, A-G, so far isolated in pure state from the seeds of Akebia quinata DECNE. were characterized as follows : saponin D (mp>225°(decomp.), [α]D+15°), 3-O-α-L-arabinopyranosyl hederagenin 28-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranoside (IV) ; E (mp 210-214°(decomp.), [α]D+6°), 3-O-β-D-xylopyranosyl-(1→2)-α-L-arabinopyranosyl hederagenin 28-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranoside (XI) ; F (mp 211-214°(decomp.), [α]D-4°), 3-O-β-D-glucopyranosyl-(1→2)-α-L-arabinopyranosyl hederagenin 28-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranoside (XIV) ; G (mp>218°(decomp.), [α]D-19°), 3-O-β-D-glucopyranosyl-(1→2)-[α-L-rhamnopyranosyl-(1→4)]-α-L-arabinopyranosyl hederagenin 28-O-α-L-rhamnopyranosyl-(1→4)-β-D-glucopyranosyl-(1→6)-β-D-glucopyranoside (XVI). They are new hederagenin 3, 28-O-bisglycosides and related to each other and to saponins A, B, and C.
