Discovery and Biological evaluation of pyrimido[4,5-d]pyrimidine-2,4(1H,3H)-dione derivatives as potent Bruton's tyrosine kinase inhibitors. - Diao, Yanyan; Fang, Xiaoyu; Song, Peiran; Lai, Mengzhen; Tong, Linjiang; Hao, Yongjia; Dou, Dou; Liu, Yingqiang; Ding, Jian; Zhao, Zhenjiang; Xie, Hua; Li, Honglin (Bioorganic & Medicinal Chemistry, 2019)