Ellagic acid rhamnosides from the stem bark of Eucalyptus globulus.
Phytochemistry
; 57(4): 587-91, 2001 Jun.
Article
in En
| MEDLINE
| ID: mdl-11394863
ABSTRACT
Four ellagic acid rhamnosides were isolated from the stem bark of Eucalyptus globulus. Their structures have been established on the basis of the analysis of their 1H NMR, 13C NMR, HMBC, IR and MS spectral data. The HMBC data of these compounds were most useful for their structure determinations, with these bring determined to be 3-O-methylellagic acid 3'-O-alpha-rhamnopyranoside, 3-O-methylellagic acid 3'-O-alpha-3''-O-acetylrhamnopyranoside, 3-O-methylellagic acid 3'-O-alpha-2''-O-acetylrhamnopyranoside, 3-O-methylellagic acid 3'-O-alpha-4''-O-acetylrhamnopyranoside, respectively. Their antioxidant activities were evaluated by measuring the inhibition of lipid peroxidation using rat liver microsomes, with IC50 values of 10.0-14.0 microg/ml.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Plants, Medicinal
/
Ellagic Acid
/
Eucalyptus
/
Antioxidants
Limits:
Animals
Language:
En
Journal:
Phytochemistry
Year:
2001
Document type:
Article