dinaphtho[1,2-b;2',3'-d]furan-7,12-dione derivatives were synthesized and evaluated for inhibitoryactivities against receptortyrosinekinases. The naphthofuroquinone compounds with dialkylaminoethoxy group at C(5)-position (7, 8, 10, and 11) manifested strong inhibitoryactivities against epidermalgrowthfactorreceptor and vascular endothelial growthfactorreceptor. Docking study of 11 with EGFR was