4-[6-[(6-溴-8-环戊基-7,8-二氢-5-甲基-7-氧代吡啶并[2,3-D]嘧啶-2-基)氨基]-3-吡啶基]-1-哌嗪羧酸叔丁酯

4-[6-(6-Bromo-8-Cyclopentyl-5-Methyl-7-Oxo-7,8-Dihydro-Pyrido[2,3-D]Pyrimidin-2-Ylamino)-Pyridin-3-Yl]-Piperazine-1-Carboxylic Acid Tert-Butyl Ester