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. 01, 2022
Filed:
Nov. 27, 2017
Applicant:
Teijin Pharma Limited, Tokyo, JP;
Inventors:
Hidetoshi Miyamoto, Tokyo, JP;
Tsuyoshi Mizuno, Tokyo, JP;
Gen Unoki, Tokyo, JP;
Yuki Miyazawa, Tokyo, JP;
Naoki Yajima, Tokyo, JP;
Assignee:
Teijin Pharma Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 471/04 (2006.01);
U.S. Cl.
CPC ...
C07D 471/04 (2013.01); C07B 2200/13 (2013.01);
Abstract
Provided is a crystal of a novel pyrido[3, 4-d]pyrimidine derivative having excellent CDK 4/6 inhibitory activity. A crystal of a compound represented by formula (I). In the formula, Rrepresents a hydrogen atom or a Calkyl group; Rrepresents a hydrogen atom or an oxo group; L represents a single bond or a Calkylene group; and X represents CH or N.