| 摘要 |
The present invention is directed to a compound of formula (I) wherein R1 and R2 are as defined herein, or a pharmaceutically acceptable salt, hydrate, or solvate thereof, a pharmaceutically acceptable prodrug thereof, or a pharmaceutically acceptable salt, hydrate or solvate of the prodrug, a pharmaceutical composition comprising a pharmaceutically effective amount of one or more compounds of the invention in admixture with a pharmaceutically acceptable carrier, a method of treating a patient suffering from a PGD2-mediated disorder including, but not limited to, allergic disease (such as allergic rhinitis, allergic conjunctivitis, atopic dermatitis, bronchial asthma and food allergy), systemic mastocytosis, disorders accompanied by systemic mast cell activation, anaphylaxis shock, bronchoconstriction, bronchitis, urticaria, eczema, diseases accompanied by itch (such as atopic dermatitis and urticaria), diseases (such as cataract, retinal detachment, inflammation, infection and sleeping disorders) which are generated secondarily as a result of behavior accompanied by itch (such as scratching and beating), inflammation, chronic obstructive pulmonary diseases, ischemic reperfusion injury, cerebrovascular accident, chronic rheumatoid arthritis, pleurisy, ulcerative colitis and the like by administering to said patient a pharmaceutically effective amount of a compound of the invention.
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