Cycloartane glycosides from Astragalus gombo
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Date
2015-01-31
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Phytochemistry Letters
Abstract
Six new cycloartane-type triterpene glycosides named 3-O-[b-D-glucopyranosyl(1 ! 2)-b-D-xylopyr-
anosyl]-3b,16b,23(R),24(R),25-pentahydroxycycloartane (1), 3-O-[b-D-glucopyranosyl(1 ! 2)-b-Dxylopyranosyl]-
3b,16b,23(R),24(R)-tetrahydroxy-25-dehydrocycloartane (2), 3-O-[b-D-xylopyrano-
syl]-6a-acetoxy-23a-methoxy-16b,23(R)-epoxy-24,25,26,27-tetranorcycloartane (3), 3-O-[b-D-xylo-
pyranosyl]-6a-acetoxy-23a-butoxy-16b,23(R)-epoxy-24,25,26,27-tetranorcycloartane (4), 3-O-[b-Dglucopyranosyl(
1 ! 2)]-b-D-xylopyranosyl]-6a-acetoxy-23a-methoxy-16b,23(R)-epoxy-24,25,26,27-
tetranorcycloartane (5), 3-O-[b-D-glucopyranosyl(1 ! 2)]-b-D-xylopyranosyl]-23a-methoxy-16b,23(R)-
epoxy-4,25,26,27-tetranorcycloartane (6), in addition to three known secondary metabolites consisting of
another cycloartane triterpene glycoside and two flavonol glycosides, were isolated from the aerial parts of
Astragalus gombo Coss. & Dur. (Fabaceae). The structures of the isolated compounds were established by
spectroscopic methods, including 1D and 2D-NMR, mass spectrometry and comparison with literature
data.
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MAAMRIA, Leyla, et al. Cycloartane glycosides from Astragalus gombo. Phytochemistry Letters, 2015, 11: 286-291.