Xanthoangelol, geranilated chalcone compound, isolation from pudau leaves (Artocarpus kemando Miq.) as antibacterial and anticancer

Abstract

Abstract From the leaves of Artocarpus kemando Miq, locally known as pudau plant, a flavonoid has been isolated and identified. The compound was then tested as antibacterial agent against Bacillus subtillis and Escherichia coli. The first step of isolation was extraction by maceration using methanol as solvent, and then followed by fractionation using partition treatment and vacuum liquid chromatography. Finally, the compound was purified using column chromatography method. The purity of the compound was evaluated using thin layer chromatography and melting point measurement, and the compound was subsequently characterized using UV–Vis, IR, and NMR spectroscopy. A total of 66.2 mg of the compound was obtained, in the form of yellow needle crystals with a melting point of 142.8–144 °C, which is a compound of geranylated chalcone, xanthoangelol. Xanthoangelol was the first chalcone compound isolated from A. kemando. Antibacterial tests were carried out at varied doses of 0.5; 0.4; and 0.3 mg/disk, and revealed that the compound exhibits high inhibitory power against B. subtillis, but has no activity against E. coli. The anticancer activity of xanthoangelol on MCF-7 cells indicated that the compound has an IC50 value of 7.79 μg/mL, suggesting that the compound possesses an active cytotoxic activity.