| abstract |
Compounds of formula (I) are useful for the treatment of disease responsive to modulation of CRTH2 receptor activity, such as asthma, rhinitis, allergic airway syndrome, and allergic rhinobronchitis, wherein A represents a carboxyl group -COON, or a carboxyl bioisostere; A1, is hydrogen or methyl; ring Ar1 is an optionally substituted phenyl ring 5-or 6-membered monocyclic heteroaryl ring, in which AA1CHO- and L2 are linked to adjacent ring atoms; rings Are2, Ar3 each independently represent a phenyl or 5- or 6-membered monocyclic heteroaryl ring, or a bicyclic ring system consisting of a 5- or 6-membered carbocyclic or heterocyclic ring which is benz-fused or fused to a 5- or 6-membered monocyclic heteroaryl ring, said ring or ring system being optionally substituted; t is 0 or 1; L2 and L3 are linker radicals as defined in the description. |