A novel series of 7-substituted-4 (3H)-quinazolinone were designed, synthesized and evaluated for their antitumor and anticonvulsant activity. Compound 7 revealed broad- spectrum antitumor effectiveness toward numerous cell lines that belong to different tumor subpanels, whereas compounds 9 and 18 possess selective activity toward leukemia cell lines. Additionally, compounds 3, 15, 16, 18, 19 and 20 showed advanced anticonvulsant ...