3-cyclopentyl-2-[4-(2,3-difluoro-phenoxy)-6-oxo-6H-pyridazin-1-yl]-propionic acid   、                                                                                      
1-(3-aminopyrazol-1-yl)-2-methyl-propan-2-ol                                                                                                                                                                                                                                                                                                          以afforded 3-cyclopentyl-2-[4-(2,3-difluoro-phenoxy)-6-oxo-6H-pyridazin-1-yl]-N-[1-(2-hydroxy-2-methyl-propyl)-1H-pyrazol-3-yl]-propionamide as a white solid (0.68 g, 53%)的产率得到3-cyclopentyl-2-[4-(2,3-difluoro-phenoxy)-6-oxo-6H-pyridazin-1-yl]-N-[1-(2-hydroxy-2-methyl-propyl)-1H-pyrazol-3-yl]-propionamide