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. 22, 1992
Filed:
Aug. 23, 1991
Fumio Suzuki, Mishima, JP;
Junichi Shimada, Shizuoka, JP;
Kenji Ohmori, Mishima, JP;
Haruhiko Manabe, Shizuoka, JP;
Kazuihiro Kubo, Shizuoka, JP;
Akira Karasawa, Huntingdon Valley, PA (US);
Tetsuji Ohno, Shizuoka, JP;
Shizuo Shiozaki, Fuji, JP;
Akio Ishii, Shizuoka, JP;
Katsuichi Shuto, Mishima, JP;
Kyowa Hakko Kogyo Co., Ltd., Tokyo, JP;
Abstract
There are disclosed s-triazolo[3,4-i]purine derivatives represented by formula: ##STR1## wherein Y-Z represents ##STR2## R.sub.4 represents hydrogen, alkyl, substituted or unsubstituted aromatic heterocyclic group or substituted or unsubstituted aryl; and X.sup.2 represents oxygen, sulfur or NH; each of R.sup.1 and R.sup.2 independently represents hydrogen, alkyl, cycloalkyl, aralkyl or substituted or unsubstituted aryl; R.sup.3 represents alkyl, cycloalkyl, aralkyl or substituted or unsubstituted aryl; X.sup.1 represents oxygen or sulfur; and represents a single bond or a double bond or pharmaceutically acceptable salts thereof.