3-cyclopentyl-2-[4-(2-methyl-pyridin-3-yloxy)-6-oxo-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-[4-(2-methyl-pyridin-3-yloxy)-6-oxo-6H-pyridazin-1-yl]-propionamide as an off-white solid (0.26 g, 18%)的产率得到3-cyclopentyl-N-[1-(2-hydroxy-2-methyl-propyl)-1H-pyrazol-3-yl]-2-[4-(2-methyl-pyridin-3-yloxy)-6-oxo-6H-pyridazin-1-yl]-propionamide