3-cyclopentyl-2-(6-oxo-4-phenoxy-6H-pyridazin-1-yl)-propionic acid   、                                                                                      
2-氨基-5-甲基-1,3,4-噻二唑                                                                                                                                                                                                                                                                                                          以afforded 3-cyclopentyl-N-(5-methyl-[1,3,4]thiadiazol-2-yl)-2-(6-oxo-4-phenoxy-6H-pyridazin-1-yl)-propionamide as a white solid (60.1 mg, 31.4%)的产率得到3-cyclopentyl-N-(5-methyl-[1,3,4]thiadiazol-2-yl)-2-(6-oxo-4-phenoxy-6H-pyridazin-1-yl)-propionamide