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:
Sep. 01, 1987
Filed:
May. 06, 1986
Applicant:
Inventors:
Takashi Mori, Tokyo, JP;
Nobuhiro Ohi, Tokyo, JP;
Yoshiyuki Ohsugi, Tokyo, JP;
Yasuhiro Yamashita, Tokyo, JP;
Assignee:
Chugai Seiyaku Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
546309 ; 546323 ;
Abstract
A compound of the formula ##STR1## wherein R.sub.1 is a hydrogen atom or a lower alkyl group which may be substituted with hydroxy, lower alkyl or di-lower alkylamino; R.sub.2 is a hydrogen atom, an amino group or a lower alkylamino group; and R.sub.3 is a lower alkyl group, and a non-toxic salt thereof, and a process for preparing the same are disclosed. The compound and the salts thereof exhibit anti-allergic effects by the two different mechanisms and are expected to be useful as drugs for treating allergic diseases such as asthma, pollen allergy, atopic dermatitis and the like.