2,3-disubstituted-4-hydroxyquinoline derivatives

摘要

2,3-disubstituted-4-hydroxyquinoline derivatives of the general formula (I): <IMAGE> (I) [wherein R1 represents a hydrogen atom or R3CO- (wherein R3 is a lower alkyl group); R2 represents a hydrogen atom, -CH3 or -C2H5; A represents <IMAGE> <IMAGE> and W represents a hydrogen atom, or 1- 4 halogen atoms or alkyl groups which are substituted at the nucleus and may be the same or different] have a strong antagonistic action on leukotriene D4.