Piperidine derivatives represented by formula (I) or nontoxic salts thereof (wherein symbols are defined in the description):
Since the compound represented by formula (I) has a PDE4 inhibitory activity, it is useful for preventing and/or treating inflammatory diseases, diabetic diseases, allergic diseases, autoimmune diseases, osteoporosis, bone fracture, obesity, depression, Parkinson's disease, dementia, ischemia-reperfusion injury, leukemia and the like.
式(I)所代表的
吡啶衍生物或其无毒盐(其中符号在描述中定义):由于式(I)所代表的化合物具有PDE4抑制活性,因此对于预防和/或治疗炎症性疾病、糖尿病、过敏性疾病、自身免疫性疾病、骨质疏松症、骨折、肥胖症、抑郁症、帕
金森病、痴呆症、缺血再灌注损伤、白血病等疾病具有用处。