Defactinib

Chemical Information
Defactinib is a small molecule kinase inhibitor targeted against focal adhesion kinase (FAK) and proline-rich tyrosine kinase-2 (Pyk2), the two members of the FAK family of nonreceptor tyrosine kinases. FAK is important for the integrin-mediated activation of several downstream signal transduction pathways, including those involving RAS/MEK/ERK and PI3K/Akt, and its upregulation is a key resistance mechanism to MAPK inhibitors, facilitating tumor cell proliferation and survival in the absence of MAPK signaling. Defactinib was approved by the US FDA in May 2025 in a co-package alongside [avutometinib] (called Avmapki Fakzynja) for the treatment of recurrent KRAS-mutated low-grade serous ovarian cancer.
| CAS Number | 1073154-85-4 |
| PubChem CID | 25117126 |
| IUPAC Name | N-methyl-4-[[4-[[3-[methyl(methylsulfonyl)amino]pyrazin-2-yl]methylamino]-5-(trifluoromethyl)pyrimidin-2-yl]amino]benzamide |
| Molecular Formula | C20H21F3N8O3S |
| Molecular Weight | 510.5 |
| XLogP | 1.4 |
| Topological Polar Surface Area | 150 |
| Hydrogen Bond Donor Count | 3 |
| Hydrogen Bond Acceptor Count | 13 |
| Rotatable Bond Count | 8 |
| Heavy Atom Count | 35 |
| Formal Charge | 0 |
| Complexity | 804 |
| Property | Value |
|---|---|
| Molecular Weight | 510.5 |
| XLogP3 | 1.4 |
| Hydrogen Bond Donor Count | 3 |
| Hydrogen Bond Acceptor Count | 13 |
| Rotatable Bond Count | 8 |
| Exact Mass | 510.14094222 |
| Monoisotopic Mass | 510.14094222 |
| Topological Polar Surface Area | 150 Ų |
| Heavy Atom Count | 35 |
| Formal Charge | 0 |
| Complexity | 804 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
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