Uma nova flavona prenilada, 2,8-dihodroxi-3,10-dimetoxi-6-(2-metil-1-propeno-1-il)-6H,7H-[1]benzopirano[4,3-b][1]-benzopirano-7-ona, juntamente com 24 compostos conhecidos foram isolados do extrato bruto em acetona das raízes de um híbrido entre Artocarpus heterophyllus e Artocarpus integer. Suas estruturas foram determinadas pelos dados de espectroscopia da ressonância magnética nuclear (NMR) 1D e 2D. Avaliaram-se as atividades antioxidante e bactericida dos compostos isolados. O novo composto mostrou atividade antioxidante potente com relação a DPPH• e superóxido com valores de IC50 de 0,033 e 0,125 mg mL-1, respectivamente.

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.