Optimization for Regorafenib in HCC

Regorafenib (BAY 73-4506) is an oral small molecule tyrosine kinase inhibitor (TKI) that potently blocks multiple protein kinases, including kinases involved in tumor angiogenesis (vascular endothelial growth factor receptor \[VEGFR\] 1, 2, 3, Tyrosine kinase with immunoglobulin-like and epidermal growth factor-like domains 2 \[TIE2\]), stem cell growth factor receptor (KIT, rearranged during transfection \[RET\], p38-alpha, a member of the mitogen activated protein kinase \[MAPK\] family, proto-oncogene c-RAF \[c-RAF\], proto-oncogene BRAF \[BRAF\], BRAFV600E), metastasis (VEGFR3, platelet-derived growth factor receptor \[PDGFR\], fibroblast growth factor receptor1 \[FGFR1\]) and tumor immunity (colony stimulating factor 1 receptor \[CSF1R\]).