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:
Mar. 16, 2021
Filed:
Sep. 25, 2019
Applicant:
Chia Tai Tianqing Pharmaceutical Group Co., Ltd., Lianyungang, CN;
Inventors:
Zhaozhong Ding, Shanghai, CN;
Fei Sun, Shanghai, CN;
Yinghu Hu, Shanghai, CN;
Yilong Zhou, Shanghai, CN;
Zheng Wang, Shanghai, CN;
Rui Zhao, Lianyungang, CN;
Ling Yang, Lianyungang, CN;
Assignee:
CHIA TAI TIANQING PHARMACEUTICAL GROUP CO., LTD., Lianyungang, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K 31/519 (2006.01); C07D 487/04 (2006.01); A61P 31/12 (2006.01);
U.S. Cl.
CPC ...
C07D 487/04 (2013.01); A61K 31/519 (2013.01); A61P 31/12 (2018.01); C07B 2200/13 (2013.01);
Abstract
The present invention relates to crystalline form A of a TLR7 agonist 2-butoxy-7-(4-(pyrrolidin-1-ylmethyl)-benzyl)-5H-pyrrolo[3,2-d]pyrimidin-4-amine (formula I), a method for preparing the crystalline form A, and the use thereof.