Breast cancer is the most common type of cancer affecting women. The synthesis of 5,4'-diaminoflavones has recently been found to exhibit potent inhibitory activity in the growth of human breast cancer cells MCF-7 (Akama, 1997, p. 1894). While aminoflavones have been found to be successful in the process of inhibiting cancer cell growth, its interaction and activation mechanism with the cancer cells is still not clear. By designing a new type of aminoflavone this study aims to reveal more about specific mechanistic interactions of aminoflavones with cancer cells.