The invention relates to a compound of formula (I):
1
wherein
A represents pyridine, pyridinium or piperidine
R
1
, R
2
, R
3
and R
4
are as defined in the description
R
5
represents hydrogen, a nitrogen-containing heterocycle or a group of formula (II):
2
R
6
represents hydrogen or linear or branched (C
1
-C
6
)alkyl.
and medicinal products containing the same which are useful in treating pain or deficiencies in memory.
                            本发明涉及一种化合物,其
化学式为(I):1其中,A代表
吡啶,
吡啶盐或
哌啶;R1、R2、R3和R4如说明书所定义;R5代表氢,含氮杂环或式(I):2的基团;R6代表氢或线性或支链烷基(C1-C6);以及含有该化合物的药物,可用于治疗疼痛或记忆力不足。