4-Ethyl-N-[4-[2-(4-morpholinyl)-4-o xo-4H-1-benzopyran-8-yl]-1-dibenzothienyl]-1-piper azineacetamide

Dual PI 3-K and DNA-PK inhibitor (IC50 values are <0.1, 0.5, 4 and 19 nM for PI 3-Kdelta, PI 3-Kbeta, PI 3-Kalpha and DNA-PK respectively). Inhibits proliferation of MCF7 cells in vitro and delays growth of MCF7 xenografts in mice. Also enhances CRISPR-Cas9-mediated homology- directed repair (HDR) efficiency, and attenuates nonhomologous end-joining (NHEJ).