A series of 4′-substituted 5-hydroxyaurone derivatives were synthesized and their inhibitory activities against the proliferation of endothelial cells and two cancer cell lines were studied. Some of these compounds functioned as potent inhibitors against the proliferation of endothelial cells and cancer cells but possessed much weaker cytotoxic activities against non-cancer cell line of CCC-HPF-1. It was demonstrated that two most ...