A new depsidone derivative from the leaves of <italic>Garcinia polyantha</italic>.

One new depsidone, polyanthadepsidone A (<bold>1</bold>), together with four known compounds were isolated from the dichloromethane extract of the leaves of <italic>Garcinia polyantha</italic>. The structures of all compounds were determined by comprehensive analyses of their 1D and 2D NMR and EI mass spectral data. All the isolates exhibited suppressive effect on phagocytosis response upon activation with serum opsonised zymosan in the IC₅₀ range of 4.5-23.80 μM, tested <italic>in vitro</italic> for oxidative burst studies of whole blood. [ABSTRACT FROM AUTHOR]