abstract |
A novel compound represented by the following formula (I) having a CRTH2 receptor antagonistic activity was found. The compound is useful for allergic diseases that are thought to involve eosinophils. (Where formula: The group represented by the formula: Etc., R 1 represents carboxy and the like, R 3 represents the formula: — (CH 2 ) n —N (—Y) SO 2 —Ar and the like, and the other substituents are as defined in claim 1. . ) |