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:
Jul. 18, 2006
Filed:
Aug. 26, 2003
Koichiro Yamada, Saitama-ken, JP;
Masataka Hikota, Shiki, JP;
Yuichi Koga, Toda, JP;
Kohei Kikkawa, Kawaguchi, JP;
Kenji Omori, Saitama, JP;
Koichiro Yamada, Saitama-ken, JP;
Masataka Hikota, Shiki, JP;
Yuichi Koga, Toda, JP;
Kohei Kikkawa, Kawaguchi, JP;
Kenji Omori, Saitama, JP;
Tanabe Seiyaku Co., Ltd., Osaka, JP;
Abstract
A pyridopyrimidine or a naphthyridine derivative of the formula (I): wherein Ris an optionally substituted nitrogen-containing heterocyclic group, etc.; Ris H or a lower alkyl group; Ris H or an optionally substituted lower alkyl group, etc.; Ris H, a lower alkyl group, COOH, etc.; Ris a lower alkyl group which may optionally be substituted by an optionally substituted aryl etc.; one of X and Y is CH and the other is nitrogen, or both of X and Y are nitrogen; or a pharmaceutically acceptable salt thereof, these compounds exhibiting excellent PDE V inhibitory activities, and being useful in the prophylaxis or treatment of penile erectile dysfunction, etc.