Tucatinib

**Semantic type:** Organic Chemical|Pharmacologic Substance

**Definition:** An orally bioavailable inhibitor of the human epidermal growth factor receptor tyrosine kinase ErbB-2 (also called HER2) with potential antineoplastic activity. Tucatinib selectively binds to and inhibits the phosphorylation of ErbB-2, which may prevent the activation of ErbB-2 signal transduction pathways, resulting in growth inhibition and death of ErbB-2-expressing tumor cells. ErbB-2 is overexpressed in a variety of cancers and plays an important role in cellular proliferation and differentiation.

**Synonyms:** - ARRY 380 - ARRY-380 - ARRY380 - Irbinitinib - N6-(4,4-Dimethyl-4,5-dihydrooxazol-2-yl)-N4-(3-methyl-4-((1,2,4)triazolo(1,5-a)pyridin-7-yloxy)phenyl)quinazoline-4,6-diamine - ONT 380 - ONT-380 - ONT380 - TUCATINIB - Tukysa