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The coumarin ring was used as a central scaffold that was substituted with a variety of bioactive functional groups, for designing and synthesizing novel MDM2 inhibitors targeting breast cancer. The synthesized derivatives, 3c, 3d, 3g, 7b, 7c and 8 with IC50s ranging from 9.4 to 9.9 µM were evaluated for their safety on MCF10a normal breast cell line. The compounds showed selectivity indices of 2...