One new prenylated flavone, 2,8-dihydroxy-3,10-dimethoxy-6-(2-methyl-1-propen-1-yl)-6H,7H-[1]benzopyrano[4,3-b][1]-benzopyran-7-one, together with 24 known compounds were isolated from crude acetone extract from the roots of a hybrid between Artocarpus heterophyllus and Artocarpus integer. Their structures were determined by 1D and 2D nuclear magnetic resonance (NMR) spectroscopic data. The antioxidant and antibacterial activities of the isolated compounds were evaluated. The new compound showed potent antioxidant activity against DPPH• and superoxide with IC50 values of 0.033 and 0.125 mg mL-1, respectively. Significant antibacterial activity against Acinetobacter baumannii was observed with MIC value of 50 mg mL-1.
Artocarpus; Moraceae; prenylated flavone; antioxidant activity; antibacterial activity
