The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 25, 2018
Filed:
Apr. 13, 2018
Jiangsu Hengrui Medicine Co., Ltd., Lianyungang, Jiangsu, CN;
Jiangsu Hengrui Medicine Co., Ltd., Lianyungang, Jiangsu, CN;
Abstract
Provided are a hydroxyethyl sulfonate of a cyclin-dependent protein kinase inhibitor, a crystalline form thereof and a preparation method therefor. Specifically, 6-acetyl-8-cyclopentyl-5-methyl-2-((5-(piperidin-4-yl)pyridin-2-yl)amino)pyrido[2,3-d]pyrimidin-7(8H)-one hydroxyethyl sulfonate (compound of formula (I)), a crystal form I thereof and a preparation method therefor are provided. Crystal form I of the compound of formula (I) has good chemical and crystalline stability, low toxicity, and low residual crystallization solvent. The compound of formula (I) and crystal form I thereof can be used in improved clinical therapy.