A compound represented by formula (I);
wherein ring A represents a nitrogen containing heterocyclic ring, ring B represents 5-membered heterocyclic ring which may have substituents, R represents a hydrogen atom or cyano and the other symbols represent as described in the specification; or a salt thereof. The compound represented by formula (I) has an inhibitory activity of DPP-IV, and therefore is useful as a preventive and/or treatment agent for type 2 diabetes mellitus, obesity, autoimmune disease, cancer metastasis, AIDS virus infection, dermatosis, prostatic hypertrophy and the like
化合物的
化学式为(I);其中环A代表含氮杂环,环B代表可能带有取代基的5元杂环,R代表氢原子或
氰基,其他符号如说明书所述;或其盐。化合物(I)具有
DPP-IV的抑制活性,因此可用作预防和/或治疗2型糖尿病、肥胖症、自身免疫疾病、癌症转移、艾滋病病毒感染、皮肤病、前列腺肥大等的药物。