(R)-1-cyclopentyl-4-isobutyl-3-piperidin-4-yl-imidazolidin-2-one 、 tert-butyl 4-[(6-ethyl-5-formylpyridin-2-yl)oxy]benzoate 以afforded 4-{5-[4-((R)-3-cyclopentyl-5-isobutyl-2-oxo-imidazolidin-1-yl)-piperidin-1-ylmethyl]-6-ethyl-pyridin-2-yloxy}-benzoic acid tert-butyl ester的产率得到4-{5-[4-((R)-3-cyclopentyl-5-isobutyl-2-oxo-imidazolidin-1-yl)-piperidin-1-ylmethyl]-6-ethyl-pyridin-2-yloxy}-benzoic acid tert-butyl ester