3-cyclopentyl-2-[4-(2-methyl-4-oxo-4H-pyran-3-yloxy)-6-oxo-6H-pyridazin-1-yl]-propionic acid   、                                                                                      
(R)-1-((2,2-Dimethyl-1,3-dioxolan-4-yl)methyl)-1H-pyrazole-3-amine                                                                                                                                                                                                                                                                                                          以afforded 3-cyclopentyl-N-[1-((R)-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl)-1H-pyrazol-3-yl]-2-[4-(2-methyl-4-oxo-4H-pyran-3-yloxy)-6-oxo-6H-pyridazin-1-yl]-propionamide as a white solid的产率得到3-cyclopentyl-N-[1-((R)-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl)-1H-pyrazol-3-yl]-2-[4-(2-methyl-4-oxo-4H-pyran-3-yloxy)-6-oxo-6H-pyridazin-1-yl]-propionamide