申请人:MERCK FROSST CANADA INC.
                            
                            
                                公开号:EP0252639A1
                            
                            
                                公开(公告)日:1988-01-13
                            
                            
Compounds of the Formulae:
and
are antagonists of leukotrienes of C4, D4 and E4, the slow reacting substance of anaphylaxis. These compounds are useful as anti-asthmatic, anti-allergic, anti-inflammatory, and cytoprotective agents.
                            这些化合物可用作抗哮喘、抗过敏、抗炎和细胞保护剂。