Lupane-triterpene glycosides from leaves of Acanthopanax koreanum

Two new lupane-triterpene glycosides named acankoreosides C and D, were isolated from the leaves of Acanthopanax koreanum. Based on spectroscopic data, the chemical structures were determined as 3-O-β-d-glucopyranosyl 3α,11α-dihydroxylup-20(29)-en-28-oic acid 28-O-α-l-rhamnopyranosyl-(1→4)-β-d-glucopyranosyl-(1→6)-β-d-glucopyranosyl ester and 3α,11α-dihydroxylup-23-al-20(29)-en-28-oic acid 28-O-α-l-rhamnopyranosyl-(1→4)-β-d-glucopyranosyl-(1→6)-β-d-glucopyranosyl ester, respectively.