2-[4-(2,6-difluoro-phenoxy)-6-oxo-6H-pyridazin-1-yl]-3-(tetrahydro-pyran-4-yl)-propionic acid 、
acetic acid 2-(3-amino-5-methyl-pyrazol-1-yl)-1-methyl-ethyl ester 以afforded acetic acid 2-{3-[2-[4-(2,6-difluoro-phenoxy)-6-oxo-6H-pyridazin-1-yl]-3-(tetrahydro-pyran-4-yl)-propionylamino]-5-methyl-pyrazol-1-yl}-1-methyl-ethyl ester的产率得到acetic acid 2-{3-[2-[4-(2,6-difluoro-phenoxy)-6-oxo-6H-pyridazin-1-yl]-3-(tetrahydro-pyran-4-yl)-propionylamino]-5-methyl-pyrazol-1-yl}-1-methyl-ethyl ester