| abstract |
There are disclosed compounds of the formula <IMAGE> wherein X is -O-, -S- or <IMAGE> Y is -CH2O-, -OCH2-, -CH2S-, -SCH2-, <IMAGE> <IMAGE> m is 1-3; A is O or NR2; B is OR2; SR2 or N(R2)2; R1 is hydrogen, loweralkyl, loweralkoxy or halo; R2 is hydrogen or loweralkyl; and the pharmaceutically acceptable salts thereof, and their use in the treatment of leukotriene-mediated naso-bronchial obstructive airpassageway conditions, such as allergic rhinitis, allergic bronchial asthma and the like. |