A compound represented by general formula (I) [wherein R represents an aryl group which may be substituted or a heteroaryl group which may be substituted] or a pharmacologically acceptable salt thereof, which has an excellent LCAT activation activity and is useful as an active ingredient for a therapeutic or prophylactic agent for arteriosclerosis, arteriosclerotic heart diseases, coronary heart diseases (including heart failure, cardiac infarction, angina pectoris, cardiac ischemia, cardiovascular disturbance and angiogenic restenosis), cerebrovascular diseases (including stroke and cerebral infarction), peripheral vascular diseases (including diabetic vascular complications), dyslipidemia, low-HDL cholesteremia, or renal diseases, particularly an active ingredient for an anti-arteriosclerosis agent.
