Urea,N-[4-[1-[(2,6-difluorophenyl)methyl]-3-(hexahydro-1H-azepin-1-yl)-1,2,3,4-tetrahydro-5-[[(2-methoxyethyl)methylamino]methyl]-2,4-dioxothieno[2,3-d]pyrimidin-6-yl]phenyl]-N'-ethyl-