Compounds of the general formula (I) which are metabolically stable and have an antagonistic activity against PGD
2
receptor:
1
wherein Y is bicyclic ring; R
1
is optionally substituted heteroaryl;
R
2
is hydrogen, etc.; R
3
is —CH
2
—CH
2
—CH
2
—CH
2
—CH═CH—COOR
4
, —CH
2
—CH
2
—CH
2
—CH
2
—X
1
—CH
2
—COOR
4
, —CH
2
—CH═CH—CH
2
—X
1
—CH
2
—COOR
4
or —CH
2
—CH
2
—CH
2
—CH
2
—COOR
4
; R
4
is hydrogen, etc.; X
1
is —O—, etc.
化合物的一般式(I),其在代谢上稳定且对
PGD2受体具有拮抗活性:其中,Y为双环环;R1为可选取代的杂环基;R2为
氢等;R3为—
CH2— — — —CH═CH—COOR4、— — — — —X1— —COOR4、— —CH═CH— —X1— —COOR4或— — — — —COOR4;R4为
氢等;X1为—O—等。