Abstract:
:Two new cycloartane-type glycosides, caspicuside I and caspicuside II, were isolated along with two known saponins, cycloastragenol and astragaloside IV, from the roots of Astragalus caspicus. As the aglycon group, caspicuside I possesses 3beta,6alpha,16beta,(24S),25-pentahydroxycycloartane (cyclocanthagenol), while caspicuside II owns (20R, 24S)-epoxy-3beta, 6alpha,16beta, 25-tetrahydroxycycloartane (cycloastragenol). The chemical structures of these new cycloartane-type glycosides were established as 3-O-alpha-L-rhamnopyranosyl-16-O-beta-D-xylopyranosyl-cyclocanthogenol and 3-O-[beta-D-xylopyranosyl(1 --> 3)-beta-D-glucopyranosyl]-6-O-beta-xylopyranosyl-cycloastragenol, respectively. These findings add to a growing body of literature demonstrating the high variation of cycloartane-type triterpene glycosides in different species of Astragalus.
journal_name
Nat Prod Resjournal_title
Natural product researchauthors
Fathiazad F,Khosropanah MK,Movafeghi Adoi
10.1080/14786410902975582subject
Has Abstractpub_date
2010-07-01 00:00:00pages
1069-78issue
11eissn
1478-6419issn
1478-6427pii
923088094journal_volume
24pub_type
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