| abstract |
This invention relates to new thiophene derivatives having antiinflammatory and analgesic activities and represented by general formula (I), wherein R1 is hydrogen, halogen, cyano, substituted lower alkyl, substituted or unsubstituted lower alkenyl, acyl, nitro, substituted or unsubstituted amino, sulfo, substituted or unsubstituted sulfamoyl, N-containing heterocyclic sulfonyl, hydroxy, substituted or unsubstituted heterocyclic group, R2 is substituted or unsubstituted aryl, and R3 is substituted or unsubstituted aryl, provided that R3 is aryl substituted with substituent(s) selected from the group consisting of amino, mono(lower)-alkylamino, acylamino, lower alkyl(acyl)amino and sulfamoyl when R1 is hydrogen, halogen or cyano, and pharmaceutically acceptable salts thereof, to processes for the preparation thereof and to a pharmaceutical composition comprising the same. |