Oxouracil 、 1-[6-(4-Cyano-phenoxy)-pyridin-3-yl]-pyrrolidine-2,2-dicarboxylic acid diethyl ester 、
尿素 以
sodium ethanolate 、
乙醇 为溶剂,
以afforded 14.3 mg of 4-[5-(2,6,8,10-Tetraoxo-1,7,9-triaza-spiro[4.5]dec-1-yl)-pyridin-2-yloxy]-benzonitrile as a colorless solid的产率得到4-[5-(2,6,8,10-Tetraoxo-1,7,9-triaza-spiro[4.5]dec-1-yl)-pyridin-2-yloxy]-benzonitrile