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Triterpene saponins from Tetrapanax papyriferum K. Koch
K Kojima1, I Saracoglu, M Mutsuga
1Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Nagoya City University, Japan.
Abstract:
Four new oleanane-type saponins, papyrioside LA--LD, were isolated from the leaves of Tetrapanax papyriferum. The structures of these new compounds were elucidated as 11 alpha-hydroxy-3,21-dioxo-olean-12-en-28-oyl-alpha-L-rhamnopyranosy l- (1-->4)-(6-O-acetyl-beta-D-glucopyranosyl)-(1-->6)- beta-D-glucopyranoside, 11 alpha-methoxy-3,21-dioxo-olean-12-en-28-oyl-alpha-L-rhamnopyranosy l- (1-->4)-(6-O-acetyl-beta-D-glucopyranosyl)-(1-->6)- beta-D-glucopyranoside, 3 alpha-hydroxy-11 alpha-methoxy-21-oxo-olean-12-en-28-oyl-alpha-L-rhamnopyranosyl-(1 -->4)- (6-O-acetyl-beta-D-glucopyranosyl)-(1-->6)-beta-D-glucopyranoside and 21 alpha-hydroxy-11 alpha-methoxy-3-oxo-olean-12-en-28-oyl-alpha-L- rhamnopyranosyl-(1-->4)-beta-D-glucopyranosyl-(1-->6)- beta-D-glucopyranoside, respectively, on the basis of spectroscopic and chemical evidence.