OXYTOCIN ANTAGONIST

摘要

Oxytocin antagonist which comprises as an active ingredient the carbostyril derivative of formula (1) or the benzoheterocyclic compound of formula (2), or a pharmaceutically acceptable salt thereof, which shows excellent oxytocin antagonist activity and hence, is useful in the protection or treatment of oxytocin relating diseases, especially, for treatment of premature delivery, dysmenorrhea, endometritis, or for stopping labour preparatory to Caesarian delivery.