1-[2-[3-(2,2-Dimethyl-[1,3]dioxolan-4-ylmethoxy)-5-(3,3-dimethyl-pyrrolidin-1-yl)-phenyl]-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazin-7-yl]-2,2-dimethyl-propan-1-one