| 摘要 |
A heterocyclic compound represented by formula (I): <CHEM> and salts thereof, and intermediates therefor are disclosed. The compound of formula (I) and salts thereof exhibit selective serotonin 2-receptor antagonistic activity and are useful for the prevention or treatment of circulatory diseases, e.g., ischemic heart diseases, cerebral vessel disturbances, and peripheral circulation disturbances. |
