Disclosed are polymorphs of the isethionate salt of 6-acetyl-8-cyclopentyl-5-methyl-2(5-piperazin-1-yl-pyridin-2-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one, which is a selective cyclin-dependent kinase 4 (CDK4) inhibitor useful for treating inflammation and cell proliferative diseases such as cancer and restenosis.
本发明涉及6-乙酰基-8-环戊基-5-甲基-2-(5-
哌嗪-1-基-
吡啶-2-基
氨基)-8H-
吡啶[2,3-d]
嘧啶-7-酮的异
硫酸盐盐的多晶形式。该化合物是一种选择性细胞周期蛋白依赖性激酶4(CDK4)
抑制剂,可用于治疗炎症和细胞增殖性疾病,如癌症和再狭窄。