A novel 2-phenylimidazo[2,1-b]benzothiazole derivative shown by the following formula ##STR1## or a salt thereof which possesses an immunoregulatory action and is useful as an antiallergic agent, an antiasthmatic, and a suppressant of rejection at tissue transplantation and skin graft.
下列式子所示的新型
2-苯基咪唑[2,1-b]
苯并噻唑衍
生物,或其盐,具有免疫调节作用,并可用作抗过敏剂,抗哮喘剂,以及组织移植和皮肤移植的
抑制剂。 ##STR1##