Abstract:
:From the seeds of Pharbitis nil (Convolvulaceae), two new oleanene-type triterpene glycosides, pharbitosides A (1) and B (2), together with beta-sitosterol, beta-sitosterol glucoside (daucosterol), caffeic acid, and methyl caffeate were isolated. The structure of pharbitoside A (1) was elucidated to be queretaroic acid 3-O-alpha-L-rhamnopyranosyl-(1-->2)-O-beta-D-glucopyranosyl-(1-->2)-beta-D-glucopyranoside (1). Pharbitoside B (2) is a 21alpha-hydroxyoleanolic acid saponin carrying the same sugar moiety as that of pharbitoside A (1).
journal_name
Chem Pharm Bull (Tokyo)journal_title
Chemical & pharmaceutical bulletinauthors
Jung DY,Ha H,Lee HY,Kim C,Lee JH,Bae K,Kim JS,Kang SSdoi
10.1248/cpb.56.203subject
Has Abstractpub_date
2008-02-01 00:00:00pages
203-6issue
2eissn
0009-2363issn
1347-5223pii
JST.JSTAGE/cpb/56.203journal_volume
56pub_type
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