申请人:Ikeda Kazuhito
公开号:US20090131412A1
公开(公告)日:2009-05-21
A compound represented by the formula (1) or a pharmaceutically acceptable salt thereof which has a therapeutic or prophylactic effect on an SNS-related disease such as neuropathic pain. (1) wherein R
1
and R
2
independently represent an alkyl group having 1 to 4 carbon atoms or the like, or R
1
and R
2
may together form a 5- to 7-membered ring; n represents a numerical number of 1 to 3; A represents a substituted or unsubstituted aryl group or the like or a formula: —N(R
5
)R
6
(wherein R
5
and R
6
independently represent a substituted or unsubstituted alkyl group or the like); and R
3
and R
4
independently represent a substituted or unsubstituted alkyl group or the like, or R
3
and R
4
may together form a substituted or unsubstituted, saturated or unsubstituted nitrogenated heterocyclic ring, provided that both of R
1
and R
2
are not a hydrogen atom when R
3
and R
4
together form a piperidine ring.