Heterocyclic compounds, pharmaceutical agent and methods thereof, having superior pharmacological action and/or physicochemical properties, which are useful for the prophylaxis or treatment of circulatory diseases such as hypertension, cardiac diseases, arteriosclerosis, renal diseases and cerebral apoplexy and/or metabolic diseases such as hyperlipidemia, obesity and diabetes and/or central nervous disorders such as cerebral infarction, and/or mental diseases such as dementia depression and depression.