Chemical investigation of lead to the isolation of a new coumarin derivative coumarin-pi (), and three known compounds (-). The structure of the new compound was elucidated by interpretation of 1D and 2D NMR data. Compound possesses a rare benzofuranylcoumarin skeleton. The isolated compounds were evaluated for antioxidant activities and coumarin-pi () exhibited significant activity with IC value of 16.3 μg/mL.
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