CSF1R-IN-12 (compound 1) is a potent inhibitor of CSF1R. Colony stimulating factor 1 (CSF-1, also known as macrophage colony stimulating factor, M-CSF) is an important growth factor that controls bone marrow progenitor cells, monocytes, macrophages, and giants. CSF1R-IN-12 has the potential for the research of cancer diseases[1].