A cell-permeable, potent, ATP-competitive inhibitor against class IA and IB PI3 kinases. GDC-0941 inhibits the growth of certain types of cancer cells. Alternative name: PI 3-K inhibitor XXI, 2-(1H-Indazol-4-yl)-6-(4-methylsulfonyl-piperazin-1-ylmethyl)-4-morpholin-4-yl-thieno[3,2- d]pyrimidine, 4-(2-(1H-Indazol-4-yl)-6-((4-(methylsulfonyl)piperazin-1-yl)methyl)thieno[3,2-d]pyrimidin-4-yl)morpholine. Purity: ≥99% (HPLC). Solubility: Soluble in DMSO or DMF. Long Term Storage: -80°C.