A compound having CRTH2 receptor antagonism, represented by the following formula (I). The compound is useful for the treatment of allergic diseases having a relation to eosinophils and the like.
A compound of the formula (I):
wherein
a group represented by the formula:
is a group represented by the formula:
and the like, R
1
is carboxy and the like, R
3
is —(CH
2
)n-N(—Y)—SO
2
—Ar and the like, the other symbols are as defined in claim
1.