Regorafenib (CAS 755037-03-7) is a potent multi-kinase inhibitor, with its core strength lying in the ability to simultaneously target and inhibit multiple kinase targets related to tumor proliferation, angiogenesis and metastasis, such as VEGFR, PDGFR and KIT. By blocking abnormal signal transduction pathways, it inhibits tumor growth through multiple links to achieve a broad-spectrum anti-tumor therapeutic effect, with a clear mechanism of action and strong targeting specificity.