| abstract |
A compound of general formula (I), wherein A represents a benzene ring, B represents a 6-membered hydrocarbon ring; X represents a lower alkylene, carbonyl or sulfonyl; Y represents a bond, oxygen or ⊃N-R1, R1 represents H or an alkyl group, R represents H, an aromatic group, or an alkyl group optionally substituted by an aromatic group; m and n each represents 1-3, or a salt thereof has potent GnRH receptor antagonizing activity. |