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. 17, 1984
Filed:
Sep. 29, 1982
Lion Corporation, Tokyo, JP;
Abstract
Novel 1-phenyl-1H-pyrazolo[3,4-b]pyrazine derivatives are provided which are represented by the formula: ##STR1## wherein A is (i) ##STR2## in which R.sub.1 and R.sub.2 are hydrogen or an alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl or amino group, or a divalent radical forming a nitrogen-containing saturated heterocyclic ring together with the nitrogen atom, (ii) ##STR3## wherein R.sub.3 is a phenyl group which is unsubstituted or substituted by halogen or a lower alkyl, lower alokoxy, carboxyl or nitro group, and R.sub.4 is halogen or a methyl or ethyl group, (iii)--OR.sub.5 in which R.sub.5 is a phenyl group which is unsubstituted or substituted by halogen or a hydroxyl, lower alkyl, lower alkoxy, amino or lower alkylamide group, or (iv)--OR.sub.6 is an alkyl group which is unsubstituted or substituted by halogen or a phenyl, furanyl, tetrahydrofuranyl or alkylamino group. These derivatives have antitumor or antiviral activity.