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A new ellagic acid derivative from the fruits of Eucalyptus globulus Labill
1State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Medical and Healthy Analysis Center, Peking University, Beijing, China.
Abstract:
Four ellagic acid derivatives have been isolated from the fruits of Eucalyptus globulus Labill., one of which is new compound, identified as 3-O-methylellagic acid 4'-O-alpha-L-2"-O-acetyl-rhamnopyranoside (1), the known compounds were identified as 3-O-methylellagic acid 4'-O-alpha-L-rhamnopyranoside (2), ellagic acid (3) and 3-O-methylellagic acid (4), on the basis of the analysis of 1H NMR, 13C NMR, HSQC, HMBC, IR and MS spectral data. It is alsoassignment the 13C NMR signals of 3-O-methylellagic acid 4'-O-alpha-L-rhamnopyranoside for the first.
