2-(diethoxymethyl)-1-benzofuran-6-carboxylic acid 、 R-3-氨基奎宁环二盐酸盐 以to afford 286 mg (70%) of N-[(3R)-1-azabicyclo[2.2.2]oct-3-yl]-2-(diethoxymethyl)-1-benzofuran-6-carboxamide hydrochloride as a white solid的产率得到N-[(3R)-1-azabicyclo[2.2.2]oct-3-yl]-2-(diethoxymethyl)-1-benzofuran-6-carboxamide hydrochloride