A series of coumarinyl chalcones derivatives were synthesized and evaluated for their antiproliferative activities on three different breast cancer cell lines (MDA-MB231, MDA- MB468, MCF7) and one non-cancer breast epithelial cell line (184B5). The coumarinyl derivatives exhibited anticancer activity against breast cancer cell lines at a micromolar range. A structure-activity relationship (SAR) analysis was performed by studying the ...