One new cycloartane-type saponin, 3-O-[β-D-xylopyranosyl-(1→2)-β-D-xylopyranosyl]-6-O- β-Dglucuronopyranosyl- 3β,6α,16β,24(S),25-pentahydroxyxyxloartane (1) was isolated from the MeOH extract of whole plant parts of Astragalus erinaceus along with 5 known saponins (2-6), cyclodissectoside, cycloastragenol, 6-O-β-D-glucopyranosyl-3β,6α,16β,24(S),25-pentahydr oxycycloartane, oleifolioside B and 3,6- di-O-β-D-xylopyranosyl-3β,6α,16β,24(S),25-pentahydr oxycycloartane, respectively. Their structures were established by the extensive use of 1D- and 2D-NMR experiments along with ESIMS and HRMS analysis. The glucuronic acid moiety in cycloartanes is a very unusual finding.

Cycloartane glycosides from Astragalus erinaceus

MASULLO, MILENA;PIACENTE, Sonia;
2012

Abstract

One new cycloartane-type saponin, 3-O-[β-D-xylopyranosyl-(1→2)-β-D-xylopyranosyl]-6-O- β-Dglucuronopyranosyl- 3β,6α,16β,24(S),25-pentahydroxyxyxloartane (1) was isolated from the MeOH extract of whole plant parts of Astragalus erinaceus along with 5 known saponins (2-6), cyclodissectoside, cycloastragenol, 6-O-β-D-glucopyranosyl-3β,6α,16β,24(S),25-pentahydr oxycycloartane, oleifolioside B and 3,6- di-O-β-D-xylopyranosyl-3β,6α,16β,24(S),25-pentahydr oxycycloartane, respectively. Their structures were established by the extensive use of 1D- and 2D-NMR experiments along with ESIMS and HRMS analysis. The glucuronic acid moiety in cycloartanes is a very unusual finding.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11386/4676605
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