Disclosed is a compound which has both of a neurite elongation activity and an angiogenesisenhancement activity, and which is applicable to the amelioration of a diseaseincluding a head injury or a central nervous system injury (e.g., spinal cordinjury), cerebral infarction, an ischemic heart disease (e.g., cardiac infarction,organic angina) and a peripheral arterial disease (e.g., critical limb ischemia),or a sequela of the disease. Specifically disclosed is a compound representedby the formula (I). Preferably, in the formula (I), the group N
