Journal
PLANTA MEDICA
Volume 72, Issue 14, Pages 1344-1347Publisher
GEORG THIEME VERLAG KG
DOI: 10.1055/s-2006-951691
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A new clerodane diterpenoid 16-hydroxycleroda-13-ene-15,16-olide-3-one (1) was isolated from the bark of Polyalthia longfolia var. pendula, along with 23 known compounds and phytosteroids. Among these compounds, 5-7, 10, and 24 were obtained for the first time from the family Annonaceae. The structures of the isolated compounds were determined by mass and spectroscopic analysis. The clerodane diterpenoids, 2-4, showed significant cytotoxicity towards Hep G2 and Hep 313 hepatoma cell lines. Furthermore, compound 5 exhibited potent anti-inflammatory activity towards formyl-(L)-methionyl-(L)-leuCyl-(L)-phenylaianine/cytochalasin B (fMLP/CB)-induced superoxide generation by neutrophils with IC50 = 0.60 +/- 0.09 Mg/mL.
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