3-cyclopentyl-2-{6-oxo-4-[2-(pyrrolidine-1-carbonyl)-phenoxy]-6H-pyridazin-1-yl}-propionic acid   、                                                                                      
1-(3-aminopyrazol-1-yl)-2-methyl-propan-2-ol                                                                                                                                                                                                                                                                                                          以afforded 3-cyclopentyl-N-[1-(2-hydroxy-2-methyl-propyl)-1H-pyrazol-3-yl]-2-{6-oxo-4-[2-(pyrrolidine-1-carbonyl)-phenoxy]-6H-pyridazin-1-yl}-propionamide as a light yellow solid (24.6 mg, 19%)的产率得到3-cyclopentyl-N-[1-(2-hydroxy-2-methyl-propyl)-1H-pyrazol-3-yl]-2-{6-oxo-4-[2-(pyrrolidine-1-carbonyl)-phenoxy]-6H-pyridazin-1-yl}-propionamide