A series of novel 2-(4-(2, 4-dimethoxybenzoyl) phenoxy)-1-(4-(3-(piperidin-4-yl) propyl) piperidin-1-yl) ethanone derivatives 9 (a–e) and 10 (a–g) were synthesized and characterized by 1H NMR, IR, mass spectral, and elemental analysis. These novel compounds were evaluated for their antileukemic activity against two human leukemic cell lines (K562 and CEM) by using the 3-(4, 5-dimethylthiazol-2-yl)-2, 5- ...