1,4-dihydropyridine derivative, process for preparing the same and pharmaceutical composition containing the same.

摘要

A 1,4-dihydropyridine derivative having the formula (I): <CHEM> wherein X is oxygen atom or nitrogen atom; when X is oxygen atom, R<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<1> group is NH2, NHR<1 min > NR<1 min >R<1 sec > or <CHEM> in which R<1 min > is a lower alkyl group or a lower alkoxyalkyl group, R<1 min min > is a lower alkyl group and n is an integer of 2 to 6; R<2> is a lower alkyl group, a lower cycloalkyl group or a lower alkoxyalkyl group and R<3> is a lower alkyl group, formyl group, dimethoxymethyl group, cyano group or amino group, when X is oxygen atom and R<1> is hydrogen atom or magnesium atom, R<3> is methyl group, when X is nitrogen atom, R<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.