This invention relates to the crystalline free base of acetyl-8-cyclopentyl-5-methyl-2-(5-piperazin-1-yl-pyridin-2-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one, formula (1) having improved properties, to pharmaceutical compositions and dosage forms comprising the free base, and to methods for making and using such compounds, compositions and dosage forms in the treatment of cell proliferative diseases, such as cancer.
本发明涉及乙酰基-8-环戊基-5-甲基-2-(5-
哌嗪-1-基
吡啶-2-基
氨基)-8H-
吡啶并[2,3-d]
嘧啶-7-酮(式(1))的结晶游离碱,其性质有所改善,还涉及包含该游离碱的药物组合物和剂型,以及制造和使用这种化合物、组合物和剂型治疗细胞增殖性疾病(如癌症)的方法。