申请人:Ogawa Kenji
公开号:US20120165553A1
公开(公告)日:2012-06-28
[Problem to be Solved]
An immunostimulant highly safe and administrable for a long period of time as well as a pharmaceutical composition containing the immunostimulant as an active ingredient and drink or food products for immunostimulation are developed and provided.
[Solution]
An immunostimulant containing a compound represented by the following general formula (I) or a pharmaceutically acceptable salt thereof as an active ingredient is provided.
R
1
is a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, R
2
to R
5
are independently a hydrogen atom, or a substituted or unsubstituted lower alkyl or lower acyl group, X is —(CH
2
)
2
—, —(CH
2
)
3
—, —(CH
2
)
4
—, —CO—CH
2
—, —CO—(CH
2
)
2
—, —CO—(CH
2
)
3
—, —CH
2
—CO—CH
2
—, —CO—O—CH
2
—, —CO—O—(CH
2
)
2
—, —O—CO—CH
2
—, —O—CO—(CH
2
)
2
—, —CH
2
—O—CH
2
—, —CH
2
—O—(CH
2
)
2
—, —O—CH
2
—, —O—(CH
2
)
2
—, —O—(CH
2
)
3
—, —NHY—CO—CH
2
—, —NHYCO—(CH
2
)
2
—, —CO—NHY—CH
2
— or —CO—NHY—(CH
2
)
2
—, Y herein is a hydrogen atom or a lower alkyl group.