| abstract |
The present invention provides a compound having a leukotriene receptor antagonistic action having a strong oral activity and having the effect lasting for a long time. A compound represented by formula (I). (In the formula, R 1 represents a carboxymethyl group, R 2 represents a hydrogen atom, R 3 represents a 3-carboxypropyl group, etc., and R 4 represents a hydrogen atom or a halogen atom.) [Selection figure] None |