α-Glucosidase and 15-lipoxygenase inhibitory activities of phytochemicals from Calophyllum symingtonianum

Abstract

A phytochemical investigation of the crude extracts of the bark and leaves of Calophyllum symingtonianum has resulted in the isolation of inophyllum D, inophyllum H, calanone, isocordato-oblongic acid, amentoflavone, carpachromene and lupenone. Their chemical structures were elucidated and confirmed by spectroscopic analysis. All flavonoids and coumarins showed significant α-glucosidase inhibitory activity, while amentoflavone gave a positive result against 15-lipoxygenase inhibition.