Urea,N-[4-[1-[(2,6-difluorophenyl)methyl]-3-(4-fluorophenyl)-1,2,3,4-tetrahydro-5-[[methyl[2-(2-oxo-1-pyrrolidinyl)ethyl]amino]methyl]-2,4-dioxothieno[2,3-d]pyrimidin-6-yl]phenyl]-N'-ethyl-