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Two new triterpenoid saponins, brachyposide A (1) {3-O-beta-D-galactopyranosyl-(1--&gt;2)-[beta-D-xylopyranosyl-(1--&gt;3)]-beta-D-glucuronopyranosyl-2beta,3beta,16alpha,23-tetrahydroxyolean-12-en-28-oic acid 28-O-beta-D-apiofuranosyl-(1--&gt;3)-beta-D-xylopyranosyl-(1--&gt;4)-alpha-L-rhamnopyranosyl-(1--&gt;2)-alpha-L-arabinopyranosyl ester} and brachyposide B (2) {3-O-beta-D-glucopyranosyl-(1--&gt;3)-beta-D-galactopyranosyl-(1--&gt;3)-beta-D-glucuronopyranosyl-2beta,3beta,23-trihydroxyolean-12-en-28-oic acid 28-O-beta-D-xylopyranosyl-(1--&gt;4)-[beta-D-apiofuranosyl-(1--&gt;3)]-alpha-L-rhamnopyranosyl-(1--&gt;2)-beta-D-glucopyranosyl ester}, together with four known triterpenoid saponins, including tabguticoside A, nipponoside D, palmatoside E and ciwujianoside A(1), were isolated from the stem bark of Acanthopanax brachypus. Their structures were elucidated on the basis of spectroscopic and chemical evidence.

Triterpenoid Saponins from the Stem Bark of Acanthopanax brachypus HARMS