Urea, N-[4-[7-[(2,6-difluorophenyl)methyl]-3-[(dimethylamino)methyl]-4,5,6,7-tetrahydro-5-(6-methoxy-3-pyridazinyl)-4,6-dioxo-2H-pyrazolo[3,4-d]pyrimidin-2-yl]phenyl]-N'-methoxy- [ 1709823-61-9 ]