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:
Oct. 27, 1992
Filed:
Jul. 26, 1990
Michio Nakanishi, Toyonaka, JP;
Katsuhiro Uchida, Kyoto, JP;
Terutake Nakagawa, Otsu, JP;
Kiyoharu Ukai, Shiga, JP;
Michiko Nagahara, Shiga, JP;
Jun Nakano, Moriyama, JP;
Kazuhiko Kimura, Otsu, JP;
Kaken Pharmaceutical Co., Ltd., Tokyo, JP;
Abstract
A 1,4-dihydropyridine derivative having the formula (I): ##STR1## wherein X is oxygen atom or nitrogen atom; when X is oxygen atom, R.sup.1 is hydrogen atom, a lower alkyl group, a lower cycloalkyl group, a lower alkenyl group or magnesium atom, when X is nitrogen atom, X-R.sup.1 group is NH.sub.2, NHR.sup.1', NR.sup.1' R.sup.1' or ##STR2## in which R.sup.1' is a lower alkyl group or a lower alkoxyalkyl group, R.sup.1' is a lower alkyl group and n is an integer of 2 to 6; R.sup.2 is a lower alkyl group, a lower cycloalkyl group or a lower alkoxyalkyl group and R.sup.3 is a lower alkyl group, formyl group, dimethoxymethyl group, cyano group or amino group, when X is oxygen atom and R.sup.1 is hydrogen atom or magnesium atom, R.sup.3 is methyl group, when X is nitrogen atom, R.sup.3 is methyl group, or a pharmaceutically acceptable salt thereof, some processes for preparing the same and a pharmaceutical composition containing the same. According to the present invention, a superior cerebral function improver can be provided.