It is intended to provide antipruritics (drugs to control itching, antiitch agents and drugs to stop itching). It is found out that a compound having an agonistic activity to the cannabinoid receptor shows an antipruritics effect.
The present invention relates to 2-imino-1,3-thiazine derivatives, in specific, 2-imino-1,3-thiazine derivatives having a selective antagonistic activity or agonistic activity to a cannabinoid type 2 receptor and their pharmaceutical use.
A compound of the formula (I) having a binding activity to the cannabinoid type 2 receptor:
1
wherein R
1
is optionally substituted heterocyclic group or the like; R
2
and R
2
each is independently hydrogen or the like; m is an integer of 0 to 2; A is optionally substituted aromatic carbocyclic group or the like.
The present invention relates to 2-imino-1,3-thiazine derivatives, in specific, 2-imino-1,3-thiazine derivatives having a selective antagonistic activity or agonistic activity to a cannabinoid type 2 receptor and their pharmaceutical use.