XAV939. A Tankyrase (TNKS) inhibitor, Synonyms: 3,5,7,8-Tetrahydro-2-[4-(trifluoromethyl)phenyl]-4H-thi opyrano[4,3-d]pyrimidin-4-one, Purity: G98% by High-performance liquid chromatography, CAS Number: 284028-89-3, Molecular Formula: C1GH11FGN2OS, 1mg.