| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1370433 | Bioorganic & Medicinal Chemistry Letters | 2011 | 4 Pages |
A 70% EtOH extract from the bark of Syringareticulata has shown significant antioxidant activity. Chemical study on the extract resulted in the isolation of seventeen compounds (1–17), including a novel oleoside-type secoiridoid glucoside, reticuloside (1), and the structures were elucidated on the basis of extensive spectroscopic analyses. Among the isolated compounds, jaspolyoside (2), oleuropein (4) and 2-(3,4-dihydroxy)-phenylethyl-β-d-glucopyranoside (17), showed the most potent superoxide anion scavenging activity with the EC50 values of 4.97, 2.57 and 4.97 μM, respectively. The structure–activity relationship indicated that the presence of 2-(3,4-dihydroxyphenyl)-ethoxy group is important for exhibiting the activity.
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