Abstract:
:Caragana tibetica KOM. (Fabaceae) is a medicinal plant that has been traditionally used in western part of China. In the course of our screening study on antioxidant activity of medicinal plants, the 70% acetone extract of the stems of C. tibetica was found to have a potent superoxide anion scavenging activity. Tibeticanol (1), a new piceatannol dimer possessing antioxidant activity, was isolated along with eleven known aromatic compounds. Their structures were elucidated on the basis of NMR and MS data. Enzyme oxidation of monomeric stilbene, piceatannol (3), with horseradish peroxidase and hydrogen peroxide yielded cassigarol E (5) and G (6) as major products. Most of the isolated compounds exhibited superoxide anion scavenging activity.
journal_name
Chem Pharm Bull (Tokyo)journal_title
Chemical & pharmaceutical bulletinauthors
Xiang T,Uno T,Ogino F,Ai C,Duo J,Sankawa Udoi
10.1248/cpb.53.1204subject
Has Abstractpub_date
2005-09-01 00:00:00pages
1204-6issue
9eissn
0009-2363issn
1347-5223pii
JST.JSTAGE/cpb/53.1204journal_volume
53pub_type
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