737789-61-6 1-[4-[1-[(2,6-difluorophenyl)methyl]-5-[[2-methoxyethyl(methyl)amino]methyl]-3-(6-methoxypyridazin-3-yl)-2,4-dioxothieno[2,3-d]pyrimidin-6-yl]phenyl]-3-methoxyurea