Synthesis of 2,3,8,9-Tetrahydropyrido[2,3- d:6,5- d']dipyrimidine-4,6-diones
Yang Liupan, Li Jiarong, Chai Hongxin, Yuan Hong, Zhang Qi, Shi Daxin
Chin. J. Org. Chem. . 2013, (01): 174 -177 .  DOI: 10.6023/cjoc201208039