Six new triterpenoid saponins have been isolated from the stem balk of Elat
tostachys apetala together with four known triterpenoid saponins. Three of
these new compounds are glycosides of a newly described genin, 29-hydroxyhe
deragenin (1). On the basis of spectral evidence, the structures of the new
saponins were concluded to be alpha -hederin 28-O-[alpha -L-rhamnopyranosy
l-( 1 --> 2)-beta -D-glucopyranosyl] ester (2), sapindoside B 28-O-[alpha -
L-rhamnopyranosyl-( 1 -->2)-beta -D-glucopyranosyl] ester (3), 3-O-beta -D-
xylopqranosyl astrantiasaponin VII (4), 3-O-[alpha -L-rhamnopyranosyl-(1 --
> 2)-alpha -L-arabinopyranosyl]-28-O-[beta -D-glucopyranosyl- (1 --> 2)-(be
ta -D-glucopyranosyl-(1 --> )}-beta -D-glucopyranosyl]-29-hydroxyhederageni
n (5), 3-O-[alpha -L-arabinupyranosyl-(1 --> 3)- alpha -L-rhamnopyranosyl-(
1 --> 2)-alpha- L-arabinopyranosyl]-28-O-[beta -D-glucopyranosyl (1 --> 2)
and 3-O-[beta -D-xylopyranosyl-(1 -->3)-alpha -L-rhamnopymnosyl-(1 --> 2)-a
lpha -L-arabinopyrunospl]-28-O-[beta -D-glucopyranosyl-(1 --> 2)-beta -D-gl
uco pyranosyl-( 1 --> 6)-beta -D-glucopyranosyl]-29-hydroxyhe (7). (C) 2001
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