3 結果
The investigation of chemical constituents from the branches of Calophyllum inophyllum Linn led to the isolation of a new prenylated xanthone, named caloxanthone Q (1), together with three known compounds, 2-deprenylrheediaxanthone B (2), jacareubin (3), and 6-deoxyjacareubin (4). Their structures
OBJECTIVE
To study the chemical constituents from the stems and leaves of Calophyllum inophyllum.
METHODS
The compounds were isolated by column chromatography on silica gel, Sephadex LH-20 and preparative TLC. Their structures were elucidated by chemical methods and NMR, MS spectroscopic
The inhibitory effects of 22 xanthones from three Guttiferae plants (Hypericum patulum, Calophyllum inophyllum and C. austroindium) on exogenous platelet activating factor (PAF)-induced hypotension were examined using a blood pressure monitoring in vivo assay method. Guanandin (2), caloxanthone E