Chemical Name: 2-(1H-Indazol-4-yl)-6-[[4-(methylsulfonyl)-1-piperazinyl]methyl]-4-(4-morpholinyl)-thieno[3,2-d]pyrimidineGDC-0941 is a potent inhibitor of PI3Kα, PI3Kβ,PI3Kδ and PI3Kγ with IC50 of 3 nM, 33 nM, 3 nM and 75 nM,respectively. Administration of GDC-0941in animals displays significant inhibitory effect against established human cancerxenografts. It is currently in clinicaltrials.PI3Kinhibitors have been used for differentiation of pluripotent stem cells.Ref: Folkes AJ, et al. Theidentification of2-(1H-indazol-4-yl)-6-(4-methanesulfonyl-piperazin-1-ylmethyl)-4-morpholin-4-yl-thieno[3,2-d]pyrimidine(GDC-0941) as a potent, selective, orally bioavailable inhibitor of class I PI3kinase for the treatment of cancer. JMed Chem 51(18):5522-32, 2008 Touboul,et al. Generation of functional hepatocytes from human embryonic stem cellsunder chemically defined conditions that recapitulate liver development.Hepatology, 51: 1754–1765, 2010